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	Question	Posted Date
	How do I clear A.EC1 with SigmaWin+ version 5 versus SigmaWin+ version 7? Posted Date: 02/09/2017 Answer: To clear A.EC1 (Safety-related Servo Parameter Unmatch Alarm) using SigmaWin+ version 5, follow the steps below: 1. In the Setup menu, select the Safety Option Module Setup Alarm Clear function. 2. Follow the on-screen prompts to reset the alarm. To clear A.EC1 (Safety-related Servo Parameter Unmatch Alarm) using SigmaWin+ version 7, follow the steps below: 1. Select the Display Alarm function (found in the Alarm category). 2. Select the axis that has the alarm (if there is only 1 axis, the axis is selected automatically by default). 3. Select the button Reset axes. 4. Follow the on-screen prompts to reset the alarm. Product Group/Line: SigmaWin Plus 7 Software, Servo Products Topic/Sub Topic: Alarm, Ask a Technical Question Document Number: SRV-474YQ7 Published Date: 02/09/2017 Share \| Rate Rate this article :	02/09/2017
	How do I add external regenerative resistors? Posted Date: 12/14/2007 Answer: First, it is important to add a regenerative resistor with the proper resistance. Otherwise, damage to the ServoPack and/or poor performance may result. Please refer to the table in Section 5.6 of the Sigma II User's Manual [YEA-SIA-S800-32.2] for the minimum allowable resistance for each ServoPack model (see attachment below also). The user's manual also discusses calculating regenerative energy capacity. Once the amount of regenerative capacity has been determined, a resistor must be acquired to satisfy the requirements. Yaskawa offers a range of resistor pack units, and while they are designed and wired to work with particular sized ServoPacks, they can be rewired/reconfigured to work most any unit. Please reference the attached document for configuration and wiring details. Once a resistor has been acquired, it is connected between terminals B1 and B2 of the SGDH ServoPack. Be sure to remove the jumper between B2 and B3 (applicable to ServoPacks between 500W to 5.0kW). Now the external regenerative resistor's useable capacity must be calculated. There are two general variations to this: 1) Natural Convection Cooling. About 20% of convection cooled resistor's capacity may be used. For example, if a resistor has a nameplate value of 1000 watts, the maximum usable capacity is 1000Watts * 20% = 200 Watts (assuming natural convection cooling). This limitation is generally specified by the resistor manufacturer to insure high MTBF, so be sure to verify the capacity reduction in your specific operating environment. 2) Forced Air Cooling. About 50% of a forced air cooled resistors capacity may be used. For example, if a resistor has a nameplate value of 1000 watts, the maximum usable capacity is 1000Watts * 50% = 500 Watts (assuming forced air cooling). Lastly, the value for Parameter PN-600 (Regenerative Resistor Capacity) must be calculated and input. PN-600 is in units of 10W, so the above calculated valued must be divided by 10 and the result is input for PN-600. For the two examples above: PN-600 = (200/10) = 20, natural convection cooling PN-600 = (500/10) = 50, forced air cooling Attached Files: 99004a.pdf is external regen specifications for the Sigma II amplifier product. It outlines the minimum value resistor rating required for a particular model number and how to use/rewire the JUSP-RA04, 05, 18, 19 resistor packs to match that rating. Troubleshooting info Note: If an A.40 alarm (overvoltage) appears, it could be due to too much instantaneous power regeneration. A remedy could be to lower the resistance value of the shunt regen resistor (but be sure not to go below min rating). Note: If an A.32 alarm (Regeneration overload) appears, the RMS regen dissipating capacity must be increased. This alarm is governed through the Pn-600 setting) Attachments: 65KB Product Group/Line: Servo Products, SGDH Sigma II Topic/Sub Topic: Ask a Technical Question, Procedure - Policy, Start Up - Installation, Wiring Document Number: MNEN-5CJMRL Published Date: 12/14/2007 Share \| Rate Rate this article :	12/14/2007
	How does the physical size of the HV600 compare with the Z1000? Posted Date: 09/03/2019 Answer: To accommodate design features, some HV600 models outer dimensions vary slightly (¼” or less) from the Z1000. However, the HV600 has mounting holes that match the Z1000 for easy replacements. Product Group/Line: Inverter Drives, HV600 Drive, Z1000 Drive Topic/Sub Topic: Ask a Technical Question, Product Launch Document Number: INV-3S2SS0 Published Date: 09/03/2019 Share \| Rate Rate this article :	09/03/2019
	How does the physical size of the GA800 compare with the A1000? Posted Date: 01/11/2019 Answer: To accommodate design features, the GA800 is slightly deeper than A1000, but there are many footprint advantages. The following summary represents Open Type (without IP20/UL Type 1 kit): From 1 to 30HP (ND), the GA800 footprint (height x width) is equal to the A1000. From 40 to 600HP (ND), the GA800 footprint averages 28% smaller than A1000. Product Group/Line: Inverter Drives, A1000 Drive, GA800 Drive Topic/Sub Topic: Ask a Technical Question, Product Launch, Sizing Document Number: INV-9J2K1H Published Date: 01/11/2019 Share \| Rate Rate this article :	01/11/2019
	How does the physical size of the FP605 compare with the P1000? Posted Date: 03/31/2022 Answer: To accommodate design features, the FP605 form factor will not match the P1000. See the FP605 dimensional drawings for details on its new outline. Product Group/Line: Inverter Drives, FP605 Topic/Sub Topic: Ask a Technical Question, Product Launch, Dimensions Document Number: INV-DBFT8R Published Date: 03/31/2022 Share \| Rate Rate this article :	03/31/2022
	How does Single Phase Converter work? Posted Date: 09/12/2017 Answer: The Single Phase Converter works much like your computer's power supply, it converts AC power to DC power. Then instead of powering the variable frequency drive with AC power the drive uses the Single Phase Converter's DC power. Product Group/Line: Inverter Drives, Single Phase Converter Topic/Sub Topic: Ask a Technical Question, Product Launch Document Number: INV-BF6U5R Published Date: 09/12/2017 Share \| Rate Rate this article :	09/12/2017
	How does GA800 differ from A1000 when installing the drive outside of an enclosure? Posted Date: 01/11/2019 Answer: A1000 comes standard with IP20/UL Type 1 parts through 125HP (@480V). Larger A1000 requires a separately sold IP20/UL Type 1 kit for this kind of installation. GA800 requires a separately sold IP20/UL Type 1 kit for all ratings (smallest through largest) when installing the drive outside of a cabinet. The standard GA800 price has been adjusted to account for the IP20/UL Type 1 kit. This is a price advantage for many applications when mounting the drive inside of an enclosure. Product Group/Line: Inverter Drives, GA800 Drive, A1000 Drive Topic/Sub Topic: Ask a Technical Question, Installation, Product Launch Document Number: INV-W7SJE8 Published Date: 01/11/2019 Share \| Rate Rate this article :	01/11/2019
	How does electronic thermal (motor protection) work? Posted Date: 07/13/2004 Answer: The motor heat characteristics are simulated by observing the motor current and operating frequency data. The motor is protected from overheating within its entire speed range. The motor characteristics differ by motor type, thus it is necessary adjust the inverter programming for the appropriate motor type, i.e., standard motors or inverter-duty motors. When dealing with multiple motors connected to one drive, a thermal relay is required for each individual motor. Most Yaskawa drives contain a UL approved motor overload protection such as Class 20. Refer to the specific Drive specifications for details. Product Group/Line: Inverter Drives, General Inverter Drives Topic/Sub Topic: Ask a Technical Question, Protective Features Document Number: DRV-5NTJJK Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	How does an SMC controller handle data which exceeds (or rolls over) the maximum value limit? Posted Date: 07/13/2004 Answer: Many programmers are concerned with overflow and what effect rollover will have on their addition and subtraction calculations. The SMC controller uses "two's compliment" math which handles rollover with no special programming. This applies to add interal status variables and user variables. To test this, Yaskawa has developed an example program that will perform a mathematical subtraction before, during, and after the rollover point. This makes calculating the difference between two numbers very easy, even when one grows past the maximum value. VAR1 and VAR2 are set to different very high numbers in the #TEST routine. The program then loops, the variables are compared, and the results are displayed. The variables are then incremented by 100,000. #TEST VAR1=2147483647-1000055 VAR2=2147483647-500055 #LOOP VAR3=VAR2-VAR1 MG "VAR1= ",VAR1," VAR2= ",VAR2," DIFF= ",VAR3 VAR1=VAR1+100000 VAR2=VAR2+100000 WT50 JP #LOOP Run this program on a SMC controller (using YTerm) and watch the terminal window for the values. After a few seconds, the variables will roll over, but the result of the subtraction will always be the same. Type "AB" in the terminal window to abort the program. Product Group/Line: Controllers, SMC-2000, SMC-3010 LEGEND-MC, YTerm Software Topic/Sub Topic: Ask a Technical Question, Applications, Programming Document Number: MNEN-5CJMMY Published Date: 07/13/2004 Share \| Rate Rate this article :	07/13/2004
	How can variables be initialized in a Sequential Function Chart (SFC) Step? Posted Date: 07/07/2013 Answer: SFC Actions can initialize variables when a Step is activated by evaluating the rising edge of the Step.X variable for that Step. For example, if there is a Step called S_Perform_Move, the internal variable S_Perform_Move.X will be set to TRUE when the Step is activated. By using an R_TRIG function block to evaluate the rising edge of this status variable, it is possible to initialize variables on the first pass through the Action. It is also possible to use the F_TRIG function block along with the Step.X variable to create code that only executes on the last scan of the Action, see attached. Attachments: 28KB Product Group/Line: Controllers, MotionWorks IEC Topic/Sub Topic: Ask a Technical Question, Programming Document Number: MTN-998L64 Published Date: 07/07/2013 Related Files: Sequence Management with SFC using Step.X variables Share \| Rate Rate this article :	07/07/2013
	How can the Yaskawa E7 drive start a fan that is windmilling in the opposite direction? Posted Date: 06/08/2007 Answer: Methods used by the Yaskawa E7 drive to start into spinning motors speed estimation method and the current detection method. View the attached for details regarding these methods. For more information, refer to pages 5-11 and 5-12 in the E7 Drive User Manual TM.E7.01 Additional information can also be found in TM.E7.02 and TM.E7B.01. Attachments: 78KB Product Group/Line: Inverter Drives, E7 Drive Topic/Sub Topic: Ask a Technical Question, Applications, Parameters, Programming Document Number: DRV-5WJK95 Published Date: 06/08/2007 Share \| Rate Rate this article :	06/08/2007
	How can the software limits in the MP controllers be configured? Posted Date: 08/19/2004 Answer: For the answer, please see the attached .JPG file. Attachments: 165KB Product Group/Line: Controllers, MP920 Machine Controller, MP930 Machine Controller, MP940 Machine Controller Topic/Sub Topic: Ask a Technical Question, Operation, Programming, Start Up - Installation Document Number: AHAR-5K8HNN Published Date: 08/19/2004 Share \| Rate Rate this article :	08/19/2004
	How can the P5/GPD506 parameter settings be adjusted or changed while the bypass drive is running in bypass mode? Posted Date: 11/29/2005 Answer: The Test/Normal switch on the front of the Bypass panel is provided to test or set up the drive without actually connecting the AC drive to the motor. When in Test mode, the contactor on the input of the inverter is energized bringing 3 phase power to the inverter but the output contactor is left de-energized. The Digital Operator can then be used for programming or to issue a run command so that the inverter can be checked for normal operation. Note: A fault message (Fault code XXX message) will be displayed on the Digital Operator when the Test/Normal switch is in the "Test" position while in Drive mode. The Test/Normal switch should be in the "Normal" position when in Drive mode. The Test mode can be used when the Drive/Off/Bypass switch is in either the "Off" or "Bypass" position. For more information, please see "Link to related files" below. Product Group/Line: Inverter Drives, P5 GPD506 Drive, P5 Drive 600 Volt Topic/Sub Topic: Ask a Technical Question, Bypass Function, Programming Document Number: DRV-5GSUMV Published Date: 11/29/2005 Share \| Rate Rate this article :	11/29/2005
	How can the NS-500 (Profibus Indexer) parameters be reset to factory defaults? Posted Date: 08/21/2002 Answer: Turn off the power to the unit and disconnect the Profibus connector. Record current settings of rotary switches. Set both rotary switches to (F). Apply control power, the Err LED will be solid red, the Comm LED will alternate red/green. Wait approximately 10 seconds. Reset is now complete. (Note: this procedure only resets option module parameters to default. If desired, user must reset SGDH parameters separately; Fn5 on amplifier). Turn off the power and set the rotary switches to the original settings. Replace Profibus connector. Product Group/Line: Controllers, NS500 Profibus Topic/Sub Topic: Ask a Technical Question, Programming, Start Up - Installation Document Number: MMIR-5D8JCT Published Date: 08/21/2002 Share \| Rate Rate this article :	08/21/2002
	How can the NS300 (DeviceNet Indexer) parameters be reset to factory defaults? Posted Date: 08/13/2002 Answer: Turn off power to unit and disconnect DeviceNet connector. Record current settings of rotary switches. Set all three rotary switches to seven (7). Apply control power. MS & NS LEDs will flash between red & green. Wait until NS LED is off and MS LED flashes red. Reset is now complete. Turn off power and return rotary switches to original settings. Replace DeviceNet connector. Product Group/Line: Controllers, NS300 DeviceNet Topic/Sub Topic: Ask a Technical Question, Programming, Start Up - Installation Document Number: MMIR-5CYRFM Published Date: 08/13/2002 Share \| Rate Rate this article :	08/13/2002
	How can the gain be changed for an Analog Input? Posted Date: 09/13/2012 Answer: The gain can be changed by setting in the Analog Frequency Command Gain parameter, n041. Other bounds can be set on the reference by configuring the Bias parameter, n042. Please refer to TM.J7.01 for more information. Product Group/Line: Inverter Drives, J7 Drive Topic/Sub Topic: Ask a Technical Question, Procedure - Policy, Programming Document Number: DRV-5NSJTK Published Date: 09/13/2012 Share \| Rate Rate this article :	09/13/2012
	How can the design life of the P1000 be twice that of the P7? Posted Date: 06/29/2012 Answer: The P7 has demonstrated exceptional quality and longevity. The P1000 takes reliability to the next level with longer life power modules, cooling fans, improved thermal design, and reduced interconnects. Product Group/Line: Inverter Drives, P1000 Drive Topic/Sub Topic: Ask a Technical Question, Product Launch Document Number: DRV-8VQKWM Published Date: 06/29/2012 Share \| Rate Rate this article :	06/29/2012
	How can the design life of the A1000 be twice that of the F7? Posted Date: 01/04/2011 Answer: The F7 has demonstrated exceptional quality and longevity. The A1000 takes reliability to the next level with longer life power modules, cooling fans, improved thermal design, and reduced interconnects. Product Group/Line: Inverter Drives, A1000 Drive Topic/Sub Topic: Ask a Technical Question, Reliability Document Number: DRV-8CCUUL Published Date: 01/04/2011 Share \| Rate Rate this article :	01/04/2011
	How can the controller error “The PLC could not perform a warm start, so the PLC performed a cold start.” be avoided so that the retained variables are not reset? Posted Date: 02/26/2018 Answer: When a project has local retained variables, and only a boot project is downloaded to the controller (by using the More button in the project control dialog), the controller will display this error after it is rebooted. To avoid this, make all retained variables global, or when downloading, download both the project and the boot project by using the Download button in the project control dialog. This is a known issue that will be fixed in a future release. Product Group/Line: MP2000iec Series, Controllers, MP2300Siec, MP2310iec, MP2600iec, MP3200iec, MP3300iec, Sigma-7Siec, MotionWorks IEC Topic/Sub Topic: Troubleshooting, Ask a Technical Question Document Number: CNT-D5V8O2 Published Date: 02/26/2018 Share \| Rate Rate this article :	02/26/2018
	How can source code be stored onto an MP2600iec Controller? Posted Date: 12/10/2019 Answer: During the download process, selecting the checkbox to include the source code zips the current project files and downloads them to the controller together with the compiled code. The zipped source can be used as a backup of the current project in case future modifications are necessary. It can be uploaded into the software development environment at a later time for editing and also provides another way to store the program in case of any data loss from third party servers or computers. Note: While the controller does have 3.5MB of flash memory available, only 1.4MB of that is allocated to MotionWorksIEC project storage. This is because there are scenarios where two copies are stored on the controller (totaling 2.8MB, leaving 0.7MB free for other user files such as Configuration and Cam/Data files, which are not included as part of the "user project". A Controller Memory Chart follows at the bottom of this FAQ. Attachments: 286KB Product Group/Line: Controllers, MotionWorks IEC, MP2000iec Series, MP2600iec Topic/Sub Topic: Ask a Technical Question, Application Example, Applications, Document Clarification, Programming, Software, Training, Troubleshooting, Upload - download software Document Number: MTN-9GHUF5 Published Date: 12/10/2019 Share \| Rate Rate this article :	12/10/2019

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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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