Introduction
When it is not possible to locate a servo motor close to an MR-J3 servo amplifier, it is necessary to run long encoder cables. To avoid problems with electrical noise, it is necessary to use a 4 wire system for cables of lengths 30 meters and more.
Design Considerations
The example system chosen is based on MR-J3 servo amplifier connected to a servo motor with an encoder cable longer than 30 meters. The servo is then connected to a QD75MH* position control system and a Q-Series PLC. This example applies to the following encoder cables:
- MR-EKCBL30M-L (30 meters)
- MR-EKCBL30M-H (30 meters)
- MR-EKCBL40M-H (40 meters)
- MR-EKCBL50M-H (50 meters)
The screen shot below from Chapter 11 of the MR-J3 servo instruction manual shows that a value of 1 must be set in the C-1 function selection:
The screen shot below from Chapter 11 of the MR-J3 servo instruction manual shows that a value of 1 must be set in the C-1 function selection:
The screen shot below shows the correct 4 wire setting in the GX Configurator QP position control software, servo parameter editing section:
Further Information
For further information, please consult the MR-J3 user manual and the GX Configurator QP help files or contact our support desk (support@adroit.co.za).
You can download this Tip in PDF format here.
