FAQ: How is an MP920's SVA servo module initially set up to ensure successful automatic reading of an absolute encoder motor?
Breadcrumb
Contact Us
contactUsAction
1) The value fixed parameter number 8, "Number of feedback pulses per rotation", must be the same as the Pn201 value (PG Divider) in the Servopack. This ensures proper absolute position calculation in the MP920.
2) The Servopack must be wired exactly as shown in the MP920's Motion module manual or use Yaskawa's pre-wired cables (SIEZ-C887-2.5). This ensures proper transmission of the absolute data.
3) If the Servopack has the Parameter, Pn000.0 = 1, for reversal of positive direction, then fixed Parameter #4 (Absolute Encoder Rotation Direction) of the SVA module must be set to "negative". If Pn000.0 = 0 (factory default) then Fixed Parameter #4 must be at its factory default: "positive".
4) In order to have the SVA automatically read the Absolute Encoder on power up, bit 6 of fixed Parameter 14, "FUNCTIONS" must be left at factory default of OFF (0.) In addition to this setting, the MP920 and Servopack control power must come up at the same time. If they do not come up at the same time the "J" warning will display on the SVA module. If a read via application program is desired, the bit 6 of fixed parameter is set to ON (1) and the read is initiated by the application program.
5) The use of a Sigma II Servopack (SGDH) requires bit 9 of fixed Parameter 14, "FUNCTIONS" to be ON (1) or "enabled". It is labeled "Sigma 2 Servopack" when looking at the windows dialog box used to set the bits in Parameter 14.
6) It is best that the axis not be in motion when the absolute encoder is being read. If it is moving, the maximum rotation allowed is 5 RPM.
7) It is highly recommended that the application program waits 500mS before enabling the servo at OBC0010 until after the IBC000A (Absolute read complete signal) has transitioned from OFF (0) to ON (1.) This rule should be adhered to if the read is automatic or from the application program.
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.
Phone
If you have an urgent request, please call: 1-800-YASKAWA (927-5292) or 1-847-887-7000.Electronically
To contact us electronically, please select your type of request and complete the form.Yaskawa America, Inc. - Drives & Motion Division
2121 Norman Drive South
Waukegan, IL 60085