Published: 07/13/2004
| Question: | Can the Sigma II absolute encoder data be preserved when the encoder cable is removed? |
| Answer: | It is possible to back-up absolute encoder data by using a battery backup cable. The Sigma II absolute encoder does not have a high-storage capacitor like the Sigma I, so multi-turn position data will be lost within a few seconds once the encoder cable is disconnected. Normally, the encoder cable is not disconnected, and the data will be retained by the backup battery installed in the amplifier. In some cases, however, it may be necessary to disconnect the encoder cable. But the system must be able to backup the data in the absolute encoder. In these cases, it is recommended to use a battery backup cable.
This battery backup cable is connected between the motor and the encoder cable. It has a battery built-in to the cable, so the encoder cable is no longer needed to bring the battery power from the amplifier. The attached document contains more information on how to construct such a cable.
Construction Note:
Connect the 3.6VDC battery to the BAT+ and BAT- of the motor encoder:
BAT+ = pin3
BAT- = pin4
(JZSP-CSP12, 0.3meter cable, non-stock) |
Product Information:
| Product Group: | Motion |
| Product: | SGDH Sigma II |
| Applications: | |
| Category: | Operation; Programming |
Other Information:
| Link to related files: |  |
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 superceed 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.
|