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	Question	Posted Date
	What are some potential causes of an A.84 Alarm? Posted Date: 06/30/2008 Answer: An A.84 (A84) alarm is an encoder data error alarm. This alarm is valid for both absolute and incremental encoders, and its meaning depends on the type of encoder. Most common application issues that cause an A.84 alarm are: - Excessive Mechanical Vibration - Excessive Electrical Noise If efforts to reduce the above causes do not eliminate the A.84 Alarm, Contact Yaskawa Technical Support for further assistance at 1-800-927-5292, then press 3 for Servo Products. Detailed Information: 12 bit Absolute Encoder This indicates that the absolute encoder data is abnormal. If this alarm appears at power on, the absolute encoder is malfunctioning and replacement may be necessary. If this alarm appears during motor operation, it could be caused by external electrical noise. In this case, check and correct wiring around the encoder (grounding of servo motor, separation of encoder and power cables, insertion of toroidal cores on cables, etc.) - to reduce noise. Incremental Encoder This indicates that data in the encoder is abnormal. If this alarm appears either during operation or at power on (intermittently or static), most commonly system vibration should be examined. Excessive vibration (exceeding motor specifications) (See FAQ # MTN-5XTTDJ) can cause high vibration forces at the cantilevered encoder end (G-forces generated by vibration cause an A.84 alarm if they exceed the motors rated spec). Remedies include: Decrease acceleration values, implement S-Curve acceleration, check the mounting face accuracy and alignment, check the coupling alignment. If alarm persists, permanent damage to encoder may have occurred and motor replacement may be required. Product Group/Line: Servo Products, SGDH Sigma II Topic/Sub Topic: Ask a Technical Question, Alarm, Troubleshooting Document Number: MNEN-5CJMKE Published Date: 06/30/2008 Share \| Rate Rate this article :	06/30/2008
	What are some possible remedies if the #ININT (Input Interrupt) special label does not work? Posted Date: 06/24/2013 Answer: The #ININT special label routine requires the "II" Input Interrupt command somewhere at the top of the program, in the initialization section to execute properly. The #ININT label will not execute unless it has been configured. An active low interrupt requires a setting such as II2. An active high input on input 4, for example, requires the command II,,,4 (Check the "II" command page in the manual for more details.) Attached is a template program. It documents all the special labels and discusses the 3 methods that can be used to resume after an interrupt. You must use the RI command, which restores the interrupt configuration (II) and returns to the program location where the interrupt first occurred. OTHERWISE, use ZS to clear the stack, re-issue the II command just as it was in the initialization section, and use the JP command to have the program. Usually this is the main program loop. It is very important to use either the RI command or re-issue the II command, because the interrupt will not execute again until either of those commands have been executed. Attachments: 7KB Product Group/Line: Controllers, SMC-2000, SMC-3010 LEGEND-MC, YTerm Software Topic/Sub Topic: Ask a Technical Question, Application Example, Programming Document Number: MNEN-5CJMPE Published Date: 06/24/2013 Share \| Rate Rate this article :	06/24/2013
	What are some possible causes for and FGN instruction error ? Posted Date: 02/18/2009 Answer: The FGN is a very simple instruction, and there are only four error possibilities: 1) The number of data pairs must match the number defined in the top of the parameter table. 2) Discontinuous X data. X axis data must be increasing. 3) Incorrect data type a) Input is float type but parameter table data is long type. b) Input is long type but parameter table data is float type. c) Input is word (16 bit) but parameter table data is 32 bit type (Long or Float.) d) Input is 32 bit type (Float or Long) but parameter table data is word (16-bit) 4) Incorrect Output Register type. Output must be a writable type. This excludes I, C, and # type. Input and Parameter Table registers can be of any type. Product Group/Line: Controllers, MotionWorks Software, MP2000 Series (MP2300-MP2200) Topic/Sub Topic: Ask a Technical Question, Alarm Document Number: MTN-6XP3TN Published Date: 02/18/2009 Share \| Rate Rate this article :	02/18/2009
	What are some of the potential causes of the A.E72 alarm? Posted Date: 02/06/2009 Answer: A.E72 alarm is the option card detection/initialization fault. It occurs when power is applied to the SGDV amplifier the first time after the removal of an option card. This alarm may occur if the option card is removed accidentally, or the amplfier was not reset after the option card is removed. To reset the A.E72 alarm, execute function Fn014 by using the digital operator or SigmaWin+. Be sure to cycle the power to the SGDV to complete the alarm reset procedure. Product Group/Line: Servo Products, SGDV EtherCAT, SGDV SigmaLogic, SGDV MP2600iec Topic/Sub Topic: Ask a Technical Question, Alarm, Troubleshooting Document Number: MTN-7FNRKP Published Date: 02/06/2009 Share \| Rate Rate this article :	02/06/2009
	What are some of the potential causes of an A.80 Alarm? Posted Date: 04/12/2006 Answer: An A.80 (A80) alarm is most often caused by external noise injection into the position feedback system (encoder or encoder cable). For a Sigma I system, this alarm occurs when there is more than 2 counts drift between the actual and expected pulse count at the positive rise of the U-Phase Hall Feedback (amplifier expects count to increase by encoder resolution per motor commutation cycle). For a Sigma II system, this alarm occurs when there is more than 2 counts drift between the actual and expected pulse count at the positive rise of the C-Phase Pulse Feedback (amplifier expects count to increase by encoder resolution per motor revolution). If the alarm is generated at power supply on, either the encoder is wired incorrectly or the servo amplifier should be replaced. If the alarm is generated at run time, noise is most likely the cause, and the following should be checked: 1) If encoder cable distance is long, check to insure that the proper wire gauge is used according to manual spec. 2) Verify the encoder cable construction according to manual spec. 3) Check to insure the encoder cable is not pinched. 4) Check to verify that the Amplifier is properly grounded to the panel field ground according to the manual spec (mounted to metal panel, and proper field ground wire used). 5) Noise entry into the system can also be reduced by using a Ferrite Core on the encoder cable - ZCAT1325-0530A, EMI/RFI clamp filter by TDK, try one or more loops of encoder wire. 6) Check that the system is not subject to excessive vibration impact *Most common fixes Product Group/Line: Servo Products, SGDH Sigma II Topic/Sub Topic: Ask a Technical Question, Alarm, Troubleshooting, Wiring Document Number: MNEN-5CJMKG Published Date: 04/12/2006 Share \| Rate Rate this article :	04/12/2006
	What are some methods for physical connections (wiring) to the MP920 218IF Ethernet Module? Posted Date: 07/13/2004 Answer: The MP920 218IF module comes with a standard AUI (Attachment Unit Interface) D-sub (DB-15) socket connector with slide latch. This AUI is provided to allow the user to select the physical connection type. To interface this with standard type physical connections such as 10Base-T (RJ-45) or 10Base-5 (Co-axial), a Transceiver Module will be required. See the attached .PDF file for complete information including cable diagrams. Attachments: 42KB Product Group/Line: Controllers, MP920 Machine Controller Topic/Sub Topic: Ask a Technical Question, Integration, Network Communications, Wiring Document Number: BFAR-5EPPAB Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	What are some issues that would cause a web application to drift when using camming with registration, and what are some remedies to this condition? Posted Date: 07/13/2004 Answer: The slave (SGDH motor) on a web handling or similar system may drift for the following reasons: 1) Slave has a non-integer based machine cycle. 2) Master has a non-integer based machine cycle. 3) Cam calculations are flawed. Please see the attached Word file for detailed information about these conditions. Attachments: 16KB 105KB Product Group/Line: Controllers, MotionWorks Plus Software, MP940 Machine Controller Topic/Sub Topic: Ask a Technical Question, Application Example, Programming, Software, Troubleshooting Document Number: KHUL-5DUSAN Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	What are some counter-measures to reduce harmonics created by AC drives? Posted Date: 06/08/2007 Answer: With inverters, some counter-measures include installing a reactor on the input side (there are both AC and DC type reactors), or the addition of a sinusoidal power supply regen converter. Product Group/Line: Inverter Drives, G5HHP Drive, G7 Drive, P7 Drive, V74X Drive, V7N Drive Topic/Sub Topic: Ask a Technical Question, Harmonics Document Number: DRV-5NVJSV Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	What are some concerns when the motor cable is over 100 meters? Posted Date: 06/20/2013 Answer: Motor torque will be reduced from a drop in voltage over the cable length. When using lengthy wires with the inverter and the motor, use wires that are thick enough to assist in reducing cable loss. Drive V/f characteristics may need adjusting to compensate for cable losses . The carrier frequency should typically be reduced as follows based on the cable length. up to 50 meters: under 10kHz. Up to 100 meters, under 5 kHz. To tune a custom V/f pattern. see the attached. For additional information, refer to TM4515, TM.E7.01, TM.E7.02, and TM.F7.01 Attachments: 31KB Product Group/Line: Inverter Drives, E7 Drive, F7 Drive, G5HHP Drive, G5 GPD515 Drive, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Installation, Lead Length, Tuning, Wiring Document Number: DRV-5NTJ6D Published Date: 06/20/2013 Share \| Rate Rate this article :	06/20/2013
	What are potential implications of using an Electro-Mechanical Relay or Switching Power Supply in conjunction with a Sigma II Servo System to enable the motor? Can A.C9 and A.E2 alarms be symptoms? Posted Date: 07/13/2004 Answer: Sigma II Servo Systems (SGDH amplifier) require a 24VDC input to enable the motor. It has been observed that in many cases, an Electro- Mechanical Relay or Contactor is utilized as a Master Control Relay to feed this 24VDC signal to the amplifier and perhaps turn on other devices in the control panel at the same time. In some cases, an A.C9 (Encoder Communications) alarm occurs as soon as the relay is engaged. Assuming the wiring for the encoder and grounding of the amplifier have been done properly, the cause is noise generated from the Electro-Mechanical Relay. Here are some remedies: 1) When using a DC relay, install a "fly wheel diode" across the relay coil. When using an AC relay (or contactor,) use a surge suppression device. This will reduce the potential for chattering, which in turn damps the noise. 2) Mount the relay as far as possible from the Servo Amplifier in the panel. 3) Route encoder cables away from the relay. 4) Install a ferrite core (Yaskawa #ESD-SR25) at the SGDH end of the encoder cable in the panel. 5) Consider using a Solid State switching device instead of an Electro-Mechanical one. If an MP940 is used in conjunction with Sigma II amplifier, an A.E2 alarm may occur. Assuming the cause is not MP940 processor time-out or MP940-SGDH synchronization error, the cause can be noise generated from the Electro-Mechanical relays. The same remedies mentioned above should prove helpful. Switching Power Supplies are also noise-generating devices that could potentially cause an A.C9 (Encoder Communications) alarm. Here are some remedies: 1) Mount the power supply as far as possible from servo amplifier. 2) Route encoder cables away from the power supply. 3) Install a ferrite core (Yaskawa #ESD-SR25) at the SGDH side of the encoder cable. 4) Consider using a linear power supply instead of a switching model. Keywords: Error, AC9, AE2 Product Group/Line: Servo Products, SGDH Sigma II Topic/Sub Topic: Ask a Technical Question, Alarm, Start Up - Installation, Troubleshooting Document Number: REKR-5E6MAE Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	What are cable leads +BA and -BA used for on cable SMCCBL0XX when using the SMC-4000? Posted Date: 04/10/2006 Answer: These leads are connected to pins 18 and 20 of the SMC-4000 axis connector which are both labeled as no connection in the SMC-4000 User's Manual. Cable SMCCBL0XX is also used for the SMC-2000, which had a battery connection on pins 18 and 20. However, when being used with an SMC-4000, leads +BA and -BA should not be connected. Typically, the SMC-2000 has been used with Sigma I amplifiers that have no battery provision of their own, so the SMC-2000 included a battery holder and connections to supply the absolute encoder with power. The SMC-4000 is typically used with Sigma II amplifiers, which do include a provision for an absolute encoder battery, so there is no need to supply battery power from the controller. Product Group/Line: Controllers, SMC-4000 Topic/Sub Topic: Ask a Technical Question, Wiring Document Number: MTN-6L5RBH Published Date: 04/10/2006 Share \| Rate Rate this article :	04/10/2006
	What applications is the Single Phase Converter appropriate for? Posted Date: 02/08/2018 Answer: The Single Phase Converter was designed with variable torque applications like fans and pumps in mind. However, it can also be used in constant torque applications that require little overload demands during acceleration and deceleration. Product Group/Line: Single Phase Converter, Inverter Drives Topic/Sub Topic: Ask a Technical Question, Applications Document Number: INV-T4QN83 Published Date: 02/08/2018 Share \| Rate Rate this article :	02/08/2018
	What Add-On Instructions are available with SigmaLogic? Posted Date: 10/29/2014 Answer: MAB_Yaskawa - Motion Axis Blend MAFR_Yaskawa - Motion Axis Fault Reset MAG_Yaskawa - Motion Axis Gear MAH_Yaskawa - Motion Axis Home MHSI_Yaskawa - Motion Axis High Speed Index MAHSP_Yaskawa - Motion Axis Home Set Position MAJ_Yaskawa - Motion Axis Jog MAM_Yaskawa - Motion Axis Move MAS_Yaskawa - Motion Axis Stop MCFG_Yaskawa - Motion Axis Configuration and Status MCLK_Yaskawa - Motion Axis Set Clock MPLS_Yaskawa Motion Programmable Limit Switch MSF_Yaskawa - Motion Axis Servo OFF MSO_Yaskawa - Motion Axis Servo ON MSQE_Yaskawa - Motion Sequence Edit MSQR_Yaskawa - Motion Sequence Run MTRQ_Yaskawa - Motion Axis Torque Control Product Group/Line: SGDV SigmaLogic, Servo Products Topic/Sub Topic: Programming, Ask a Technical Question Document Number: SRV-3UYEFK Published Date: 10/29/2014 Share \| Rate Rate this article :	10/29/2014
	What A1000 enclosure types are available? Posted Date: 01/03/2011 Answer: NEMA 1 is the standard offering up to 200-240V 75HP ND, 380-480V 150HP ND, and 500-600V 100HP ND; IP00 protected chassis versions are available above those ratings. The standard product can be mounted conventionally, or with its heatsink external (with addition of NEMA 1 external heatsink kit for small drives); however, for installations requiring both NEMA 12 and heatsink external, the A1000 is offered in a special 'Flange' model that provides NEMA 12 integrity on its backside. Product Group/Line: Inverter Drives, A1000 Drive Topic/Sub Topic: Ask a Technical Question, Enclosure Document Number: DRV-8CDJW7 Published Date: 01/03/2011 Share \| Rate Rate this article :	01/03/2011
	UV -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: UV DC Bus Undervolt Description: The main circuit or control circuit voltage has fallen below the under voltage trip point momentarily. A minor fault contact output can be programmed by using the multi-function outputs. (GPD515/G5 only) Possible Cause(s): Single phase condition on the input, low input voltage at L1, L2, and L3. Corrective Action: Check the three phase input voltage, verify setting of L2-05 for GPD515/G5. For more information and a complete list of fault codes see the following manuals TM4515 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5 GPD515 Drive, P5 GPD506 Drive, P5 Drive 600 Volt, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P2L6Y Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	UV -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: Uv (blinking) Description: UV (Main circuit low voltage) Main circuit DC voltage drops below the low-voltage detection level while the drive output is OFF. 230V: Stops at main circuit DC voltage below appox. 200V (160 for singelphase) 460V: Stops at main circuit DC voltage below approx. 400V. Causes and Corrective Actions: Check the following: * Power supply voltage * Main circuit power supply wiring is connected. * Terminal screws are securely tightened. A complete list of fault codes is available in the instruction manual. Find the TM.V7.01 manual on the Yaskawa website. Product Group/Line: Inverter Drives, V7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P3H6A Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	UV3 -- Fault Code Description Posted Date: 11/16/2009 Answer: Digital Operator Display Text: UV3 MC Answerback Description: Soft Charge Circuit Fault. The pre-charge contactor opened while the Drive was running. Causes: Contacts on the soft charge contactor are dirty and the soft charge contactor does not function mechanically. Corrective Actions: Cycle power off and on to the Drive - - - Check the condition of the soft charge contactor - - - Repair or replace the Power PCB/Gate Drive PCB. For information on resetting a fault, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM.E7.01, TM.F7.01 and TM.P7.01. Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, P7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P4QFF Published Date: 11/16/2009 Share \| Rate Rate this article :	11/16/2009
	UV3 - Fault Code Description Posted Date: 06/20/2013 Answer: Digital Operator Display Text: UV3 MC Answerback Description: The pre-charge contactor opened while the inverter is running. This fault only applies to 230 V units 18kW ~ 75kW, 460 V units 22kW ~ 160kW and 600 V units 30kW ~ 160kW Possible Cause(s): Contacts on contactor are dirty, contactor does not function mechanically Corrective Action: Check the contactor, check the ribbon cable from the control board to the gate drive board. For information on resetting a fault on G5, E7, F7or G7 Drives, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM4515, TM4506 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5 GPD515 Drive, P5 GPD506 Drive, P5 Drive 600 Volt, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5NZR3T Published Date: 06/20/2013 Share \| Rate Rate this article :	06/20/2013
	UV2 -- Fault Code Description Posted Date: 11/16/2009 Answer: Digital Operator Display Text:UV2 CTL PS Undervolt Description: Control Power Supply Undervoltage. Undervoltage of the control circuit when running. Causes: External load connected pulling down the Drive power supplies Corrective Actions: Cycle power off and on to the Drive - - - Repair or replace the Power PCB/Gate Drive PCB - - - Remove all control wiring and test Drive. For information on resetting a fault, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM.E7.01, TM.F7.01 and TM.P7.01. Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, P7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P4QCZ Published Date: 11/16/2009 Share \| Rate Rate this article :	11/16/2009
	UV2 -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: Uv2 Description: UV2 (Control power supply fault) Voltage fault of control power supply is detected. Causes and Corrective Actions: Cycle power. If the fault remains. replace the drive. A complete list of fault codes is available in the V7 instruction manual. Find the manual on the Yaskawa website. Product Group/Line: Inverter Drives, V74X Drive, V7N Drive, V7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P3PNQ Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	UV2 - Fault Code Description Posted Date: 06/20/2013 Answer: Digital Operator Display Text: UV2 CTL PS Undervolt Description: Undervoltage of the control circuit when running 230 V Units - 30kW ~ 75kW, monitors the (-15V) power supply 460 V Units - 55kW ~ 160kW, monitors the (-15V) power supply Possible Cause(s): External load connected pulling down the inverter power supplies. Corrective Action: Repair or replace the power/gate drive board There is other related information on this FAQ, see "Link to related files" below. For information on resetting a fault on G5, E7, F7or G7 Drives, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM4515, TM4506 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5 GPD515 Drive, P5 GPD506 Drive, P5 Drive 600 Volt, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5NZQXQ Published Date: 06/20/2013 Share \| Rate Rate this article :	06/20/2013
	UV1 -- Fault Code Description Posted Date: 11/16/2009 Answer: Digital Operator Display Text:UV1 DC Bus Undervolt Description:DC Bus Undervoltage: The DC bus voltage is less than or equal to L2-05 208-240Vac: Trip point is less than or equal to 190Vdc 480Vac: Trip point is less than or equal to 380Vdc. Causes:Low input voltage at R/L1, S/L2 and T/L3 - - - The acceleration time is set too short - - - Voltage fluctuation of the input power is too large Corrective Actions:Check the input circuit and increase the input power to within specifications - - - Extend the time in C1-01 - - - Check the input voltage. For information on resetting a fault, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM.E7.01, TM.F7.01 and TM.P7.01. Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, P7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P4Q7X Published Date: 11/16/2009 Share \| Rate Rate this article :	11/16/2009
	UV1 - Fault Code Description Posted Date: 06/20/2013 Answer: Digital Operator Display Text: UV1 DC Bus Undervolt Description: Undervoltage of the main circuit when running. 230 V Units - trip point 190 V DC or less 460 V Units - trip point 380 V DC or less 600 V Units - trip point 546 V DC or less Possible Cause(s): Single phase condition on the input, low input voltage at L1, L2, and L3 Corrective Action: Check the three phase input voltage, verify L2-05 for 515/G5 units. For information on resetting a fault on G5, E7, F7or G7 Drives, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM4515, TM4506 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5HHP Drive, G5 GPD515 Drive, P5 GPD506 Drive, P5 Drive 600 Volt, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5NZQR6 Published Date: 06/20/2013 Share \| Rate Rate this article :	06/20/2013
	UL3 -- Fault Code Description Posted Date: 11/16/2009 Answer: Digital Operator Display Text:UL3 Undertorq Det 1 Description:Undertorque Detection 1 Drive output current < L6-02 for more than the time set in L6-03. Causes:Motor is underloaded Corrective Actions:Ensure the values in L6-02 and L6-03 are appropriate - - - Check application/machine status to eliminate fault. For information on resetting a fault, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM.E7.01, TM.F7.01 and TM.P7.01. Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, P7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P4Q5A Published Date: 11/16/2009 Share \| Rate Rate this article :	11/16/2009
	UL3 -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: UL3 Description: When under torque is detected, drive performs operation according to the preset setting of constant n117. Causes and Corrective Actions: Parameter n118 up to the lowest value allowed for the machine. A complete list of fault codes is available in the V7 instruction manual. Find the manual on the Yaskawa website. Product Group/Line: Inverter Drives, V74X Drive, V7N Drive, V7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P3JQK Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	UL3 (blinking) -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: UL3 (blinking) Description: UL3 (Under torque detection) V/f mode: Drive output current fell below the preset value in parameter n118. Vector mode: Motor current or torque fell below the preset value in parameter n097 and n118. Causes and Corrective Actions: Load (output current or output torque) is too low. Check the driven machine and correct the cause of the fault, or decrease the value of parameter n118. A complete list of fault codes is available in the V7 instruction manual. Find the manual on the Yaskawa website. Product Group/Line: Inverter Drives, V74X Drive, V7N Drive, V7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P3K42 Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	The VG3 or VCD703 - Vector Drive uses terminals 30 and 31 as inputs for a motor thermistor. With no thermistor connected, the drive faults immediately. Is it possible to use a motor without a thermistor? Posted Date: 06/07/2007 Answer: Yes. In parameter On-02, change the second digit from the right [x x 1 x] from a "0" to a "1". This will allow "Control without thermistor". Product Group/Line: Inverter Drives, VG3 VCD703 Drive Topic/Sub Topic: Ask a Technical Question, Programming, Protective Features Document Number: DRV-5GYLUY Published Date: 06/07/2007 Share \| Rate Rate this article :	06/07/2007
	The V7 Drive Jog Reference (S7) command is given. Why doesn't the motor move? Posted Date: 07/13/2004 Answer: The Jog Reference is not a 'run' command. It merely switches the speed reference from the selected frequency reference (terminal FR for example) to the internal Jog frequency reference (n032). To make the drive run at jog frequency, energize both the run command (S1) and the Jog Reference(S7). As an alternative to wiring a second digital input: A "Jog Forward" command can be achieved on the V7 by adding a diode (common Radio Shack rectifier diode). The following conditions have to be met... 1. The digital inputs must be set to "NPN" . 2. The drive must be set for "2-wire control" Add the diode between the jog input (S7 for this example) and the Run input. Anode towards S1, and Cathode towards S7. Note: Earlier versions of the V7 Drive were named GPD 315/V7, GPD 315 or VS Mini V7. Product Group/Line: Inverter Drives, V74X Drive, V7 Drive Topic/Sub Topic: Ask a Technical Question, Troubleshooting, Programming Document Number: DRV-5FLM8A Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	The P5/506 bypass panel "Fault" light is ON, but no fault code is shown on the keypad display. What's wrong? Posted Date: 06/11/2014 Answer: See attached. Attachments: 30KB Product Group/Line: Inverter Drives, P5 GPD506 Drive, P5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Bypass Function, Troubleshooting Document Number: DRV-5GVRHX Published Date: 06/11/2014 Share \| Rate Rate this article :	06/11/2014
	The Motionworks IEC software stopped running after installing InteractX software? How can I recover from this? Posted Date: 03/04/2010 Answer: The InteractX software removes a required registry item required by MotionWorks IEC. To correct this issue: 1. Navigate to the installed location of Motionworks IEC (usually C:\Program Files\Yaskawa\MotionWorks IEC Pro). 2. Run the SETUPEX.EXE file by double clicking. 3. Reboot the computer. MotionWorks IEC should be able to run again. Product Group/Line: Controllers, MotionWorks IEC Topic/Sub Topic: Ask a Technical Question, Software Document Number: MTN-837SX6 Published Date: 03/04/2010 Share \| Rate Rate this article :	03/04/2010
	The MotionWorks IEC Hardware Configuration software is unable to connect to the MPiec controller. What should I check to correct the problem? Posted Date: 09/23/2013 Answer: Please see the attached PDF for a detailed explanation. Attachments: 446KB Product Group/Line: Controllers, MotionWorks IEC Topic/Sub Topic: Ask a Technical Question, Software Document Number: MTN-9AJMA2 Published Date: 09/23/2013 Share \| Rate Rate this article :	09/23/2013
	The J7 drive will only allow the parameter to viewed but not changed.What must be done to change parameter values in the J7/305 AC drive? Posted Date: 06/11/2014 Answer: See attached. Attachments: 44KB Product Group/Line: Inverter Drives, J7 Drive Topic/Sub Topic: Ask a Technical Question, Programming, Start Up, Troubleshooting Document Number: DRV-5GSUDM Published Date: 06/11/2014 Share \| Rate Rate this article :	06/11/2014
	The Hardware Configuration launches, but does not appear after using dual displays, is there a way to reset its position? Posted Date: 08/04/2014 Answer: Yes. Please see the attached document. Attachments: 245KB Product Group/Line: Controllers, MotionWorks IEC, MP2000iec Series, MP2300Siec, MP2310iec, MP2600iec, MP3200iec Topic/Sub Topic: Ask a Technical Question, Adjustments, Environment, Operation, Programming, Troubleshooting Document Number: MTN-9GRS4X Published Date: 08/04/2014 Share \| Rate Rate this article :	08/04/2014
	The GPD 515/G5 displays a parameter, but does not let me change it. Why? Posted Date: 07/13/2004 Answer: Parameter A1-01 controls access to all parameters that are available in the control method being used. A setting of 'Advanced' allows all of the available parameters of the current control method to be changed. Some parameters are not available in some control methods. Refer to Appendix 1 in the technical manual. Product Group/Line: Inverter Drives, G5 GPD515 Drive, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Troubleshooting, Programming Document Number: DRV-5FLM9Y Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	The GPD/515G5 instruction manual (TOE-S616-10.13) (pages 21-22) specifies that input fuses should be used on the installation of these drives.--Is fusing required or is a circuit breaker sufficient protection for the inverter?--If fusing is not required, what characteristics of MCCB should used be to protect the drive adequately? Posted Date: 06/08/2007 Answer: In the U.S., two types of branch circuit protection are required by local and national codes, branch circuit overload protection and branch circuit short-circuit protection. This protection is necessary to protect the circuit feeding the device (mainly input wiring). See attached for full details. Attachments: 17KB Product Group/Line: Inverter Drives, G5 GPD515 Drive, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Circuit Protection Document Number: DRV-5T6SRU Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	The E7L will not run the motor in Hand or Auto mode. What can cause this? Posted Date: 10/27/2005 Answer: Possible Solution: 1. The ribbon cable UWR00562-1 may be partially plugged or loose between Electronic Bypass Keypad (A3) and Electronic Bypass Control PCB (A2). Attempt to reseat or push the ribbon connector in as needed on one, or both ends to correct this problem. (See attachment.) Other symptoms of this problem include: 1. Drive LED flashes. 2. Stop LED is lit. 3. Contol Power LED is lit. 4. No Ready LED. Refer to TM.E7L.01 the E7L Drive Bypass Technical Manual for more information. Attachments: 97KB Product Group/Line: Inverter Drives, E7L Drive Bypass Topic/Sub Topic: Ask a Technical Question, Operation, Start Up, Troubleshooting Document Number: DRV-5VWPB6 Published Date: 10/27/2005 Share \| Rate Rate this article :	10/27/2005
	The E7 drive inside the bypass enclosure unit doesn't have the Hand, Off or Auto buttons that are shown in the E7 manual. How can the drive be run locally? Posted Date: 07/13/2004 Answer: To limit confusion, the Hand, Auto and Off buttons on the keypad were disabled and a membrane/sticker was placed over the buttons on the face of the keypad. This is done only on units that have a seperate H-O-A switch on the door of the enclosure.These functions can only be accessed manually, by adjusting the Hand/Off/Auto switch located on the front panel of the bypass unit. They are peripheral methods for changing operation methods. The purpose for this is to limit confusion by having only one Hand/Off/Auto control. Product Group/Line: Inverter Drives, E7B Drive Bypass Topic/Sub Topic: Ask a Technical Question, Bypass Function, Keypad-Operator, Programming, Start Up Document Number: DRV-5GRV4D Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	The E7B bypass unit with the serial communications, option J or option L control comes set up for the start/stop as well as the speed reference to be controlled through serial communication. Is it possible to maintain start/stop control through serial communication while using an analog signal for speed reference? Posted Date: 06/11/2014 Answer: See attached. Attachments: 18KB Product Group/Line: Inverter Drives, E7B Drive Bypass Topic/Sub Topic: Ask a Technical Question, Bypass Function, Networks, Programming Document Number: DRV-5GZPRR Published Date: 06/11/2014 Share \| Rate Rate this article :	06/11/2014
	The Drive Wizard .PARMS file was edited with another program (ie. Microsoft Word, Notepad) and saved. When reopened with DriveWizard, an error code of "File Error" was displayed on-screen. What is the problem and how can this be corrected? Posted Date: 09/13/2012 Answer: See attached. For additional information, refer to TM.DW.04 the DriveWizard Manual. Attachments: 157KB Product Group/Line: Inverter Drives, DriveWizard Software, DriveWizard Software 6.0 Topic/Sub Topic: Ask a Technical Question, Drive Wizard, Software, Troubleshooting Document Number: DRV-5W4JY4 Published Date: 09/13/2012 Share \| Rate Rate this article :	09/13/2012
	The Alarm output on the CACR HR Servopack no longer works. It is always open (or closed) regardless if the servopack is in an alarm state or not. What causes this situation? Posted Date: 03/12/2002 Answer: Assuming the Servopack 's Alarm output is wired correctly, the most common problem is that the relay's coil resistance is too low and the output has "burned out." The output photo-transistor used on the HR- Servopack (as well as most all of Yaskawa's servo products) is designed to handle a maximum of 50mA through it. The maximum voltage level allowed across the photo-transistor when OFF is 30VDC. Therefore, the safest selection is a relay coil with at least 600-ohms. If the power supply is a regulated 24VDC, then 480-ohms is acceptable. The second most common problem is connecting a relay with a "fly wheel diode" incorrectly and shorting the power supply accross the output. Remember that the Alarm outptus are ON (conducting) when NO ALARM is present. Therefore, if the relay's coil resistance is too low, it will damage the output. Attachments: 606KB Product Group/Line: Servo Products, CACR-HR Topic/Sub Topic: Ask a Technical Question, Troubleshooting, Wiring Document Number: MNEN-5CJML8 Published Date: 03/12/2002 Share \| Rate Rate this article :	03/12/2002
	The AC drive repeatedly displays an OV (Overvoltage) fault when the inverter is stopping. What causes this? Posted Date: 06/11/2014 Answer: See attached. Attachments: 28KB Product Group/Line: Inverter Drives, General Inverter Drives Topic/Sub Topic: Ask a Technical Question, Dynamic Braking, Protective Features, Starting - Stopping, Troubleshooting Document Number: DRV-5GSUAZ Published Date: 06/11/2014 Share \| Rate Rate this article :	06/11/2014
	The "sleep" function can only be used when PID is enabled. If an analog (0-10VDC or 4-20mA) signal for speed reference is used, is there any way to use "sleep" without enabling PID? Posted Date: 11/29/2005 Answer: Yes. The minimum frequency must be kept at 1.5 Hz, and the "Prohibit Frequency" parameters will need to be used. Set parameter n062 equal to the midway point between 1.0Hz and the desired sleep frequency. Set parameter n064 equal to the difference between the midway point and 1.0 Hz. Example: A sleep frequency of 20.0 Hz is desired. 20.0 - 1.0 = 19.0 Difference = 19.0/2 = 9.5 Midway point = 1.0 + 9.5 = 10.5 Hz Set n062 = 10.5 Hz Set n064 = 9.50 Hz -- When starting up, the output frequency will remain at 0.0 Hz until the reference signal reaches a minimum of 20.0 Hz. -- With a decreasing frequency reference, the output frequency will level off at 20.0 Hz as the reference descends below 20.0 Hz. When the reference goes below the midpoint (10.5 Hz in the example), the output frequency will then ramp down to 0.0 Hz. For more information, please see TM4506. Product Group/Line: Inverter Drives, P5 GPD506 Drive, P5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Applications, Programming, Speed Control Document Number: DRV-5HLNCZ Published Date: 11/29/2005 Share \| Rate Rate this article :	11/29/2005
	SVE -- Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: SVE Zero Servo Fault Description: In the zero servo mode, the motor shaft has rotated 10,000 non-quadrature PG pulses from the home position. Possible Cause(s): Torque limit or zero servo gain set too low, load torque excessively Corrective Action: Verify the program parameters B9-01 zero servo gain and torque limit settings L7-01 ~ L7-02, check for noise on the PG signals. For information on resetting a fault on G5, E7, F7or G7 Drives, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM4515 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5 GPD515 Drive, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P2HRQ Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	Specification of 12 pulse input transformer for GPD505/506- PC5/P5 series AC drive. Posted Date: 06/12/2014 Answer: See attached. Attachments: 21KB Product Group/Line: Inverter Drives, P5 GPD506 Drive, P5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Harmonics Document Number: DRV-5JWSZL Published Date: 06/12/2014 Share \| Rate Rate this article :	06/12/2014
	Sometimes my machine power-up position is incorrect even though I have an absolute encoder on the motor. What is causing this issue? Posted Date: 05/19/2015 Answer: The absolute encoder rollover value must be properly calculated and stored in servopack parameter Pn205. This parameter is the Multi-Turn Limit Setting. It is necessary to set this value properly for rotary applications which move infinitely in one direction and utilize an absolute encoder. Example applications include indexing tables, spindles, turrets, winders, and conveyors. Pn205 allows the absolute encoder to synchronize itself with the mechanical load's position. The value must be chosen so that the number of turns tracked by the absolute encoder of the motor is an integer multiple of the desired mechanical cycle of the mechanism. When Pn205 is set incorrectly, the mechanism's home position may not be correct after a power cycle. Please see the attached documents that illustrate how to calculate Pn205 with three example applications. IMPORTANT NOTE: After making a change to Pn205 and cycling the power, the drive will display alarm A.CC0 (Multi-turn Limit Disagreement Error). This alarm is fixed by executing the "Multiturn Reset" function found in the web server (section "Machine Operations", tab "Drive Pn"). After executing this function, cycle power again to clear the alarm. Attachments: 106KB 292KB Product Group/Line: Controllers, Servo Products, MP2000iec Series, MP2300Siec, MP2310iec, MP2600iec, MP3200iec, SGDV MP2600iec, SGDV Analog, SGDV EtherCAT, SGDV Indexer, SGDV MECHATROLINK-II, SGDV MECHATROLINK-III, SGDV SigmaLogic Topic/Sub Topic: Ask a Technical Question, Adjustments, Alarm, Application Example, Applications, Hardware, Instructions, Operation, Parameters, Software, Specifications, Start Up - Installation, Troubleshooting Document Number: MTN-99GLV2 Published Date: 05/19/2015 Share \| Rate Rate this article :	05/19/2015
	Should motor cable length be a concern when installing an AC drive?, Is it ok to have a motor 300ft from the drive? Posted Date: 06/12/2014 Answer: See attached. Attachments: 17KB Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, G5 Drive 600 Volt, G5HHP Drive, G7 Drive, P7 Drive, VS mini Drive Topic/Sub Topic: Ask a Technical Question, Applications, Installation, Motors, Wiring Document Number: DRV-5H8NHJ Published Date: 06/12/2014 Share \| Rate Rate this article :	06/12/2014
	Serial communication is lost intermittently between the building automation system (BAS) and a Lonworks board on the GPD506 / P5 drive. What might be causing this? Posted Date: 06/12/2014 Answer: See the attached for several tips that may help resolve intermittent serial communication loss with Lonworks and the GPD506/P5. For further information, please refer to TM4506. Attachments: 42KB Product Group/Line: Inverter Drives, Network Comms-Lonworks, P5 GPD506 Drive, P5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Troubleshooting Document Number: DRV-5JEVFE Published Date: 06/12/2014 Share \| Rate Rate this article :	06/12/2014
	SER - Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: SER (blinking) Description: SEr (Sequence error) Drive receives LOCAL / REMOTE select command or communication / control circuit terminal changing signals from the multifunction terminal while the drive output is ON. Causes and Corrective Actions: Check the external circuit (sequence). A complete list of fault codes is available in the V7 instruction manual. Find the manual on the Yaskawa website. Product Group/Line: Inverter Drives, V74X Drive, V7N Drive, V7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P3JBV Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	SC - Fault Code Description Posted Date: 06/08/2007 Answer: Digital Operator Display Text: SC Short Circuit Description: The inverter output is short-circuited. Possible Cause(s): Shorted inverter output phase to phase, shorted motor, locked rotor. Corrective Action: Remove the motor and run the inverter without the motor. Check the motor for a phase to phase short. Check the inverter for a phase to phase short at the output. For information on resetting a fault on G5, E7, F7or G7 Drives, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM4515, TM4506 and PP.P5G5.01. Product Group/Line: Inverter Drives, G5HHP Drive, G5 GPD515 Drive, P5 GPD506 Drive, P5 Drive 600 Volt, G5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5NZS4Y Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	RR -- Fault Code Description Posted Date: 11/16/2009 Answer: Digital Operator Display Text:RR DynBrk Transistr Description:Dynamic Braking Transistor. The dynamic braking transistor failed. Causes: Shorted dynamic braking transistor, high DC bus voltage, defective dynamic braking resistor. Corrective Actions:Cycle power off and on to the Drive - - - Replace defective dynamic braking transistor or resistor - - - Monitor DC bus voltage. For information on resetting a fault, see FAQ# DRV-5P8PGJ. For more information and a complete list of fault codes see the following manuals TM.E7.01, TM.F7.01 and TM.P7.01. Product Group/Line: Inverter Drives, E7 Drive, E7B Drive Bypass, E7C Drive Configured, E7E Drive Engineered, E7L Drive Bypass, E7N Narrow Bypass Package, E7S Slim Configured Drive, F7 Drive, P7 Drive Topic/Sub Topic: Ask a Technical Question, Fault Code Description Document Number: DRV-5P4Q3A Published Date: 11/16/2009 Share \| Rate Rate this article :	11/16/2009

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SAFETY PRECAUTIONS AND INSTRUCTIONS FOR USE OF FAQ INFORMATION!

Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not supersede it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.

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