Fx 3s 20MT/ESS With Mrj3a Servo Drive

[mick1994 3]

Dear all, I had bought a mitsubishi plc fx3s-20MT/ESS which is the source output and I plan to try to send pulse to Mrj3a Servo Drive. According to the manual, it stated that the servo drive able to support the source type plc but I do find out that manual also mention that only sink type plc is suitable for melsec servo drive. 

Anyone can help me in this case? 

[FredrikS 0]

Hello,

It is possible, You use pin 11 and 36 instead of 10 and 35 for input. Please check in manual for correct installation.

Best regards

Fredrik

 

[mick1994 3]

Hi Fredrik.
 

Thanks for your reply. I tried a simple program using DDRVI instruction and i found out that the servo motor only able to drive in one direction when i connect to pin 11 or pin 36. As DDRVI instruction using two pin (Y0 and &4). Y0 refer to the pulse and Y4 refer to the direction. But i don't know how actually it works to control the direction of the motor?

Do I need to use another output pin of PLC for another direction ? 

[glavanov 40]

When you use relative coordinate system, just put negative sign (-) in front of pulse count.

The positioning instruction look's for the pulse sign int to cw/ccw the servo

[DDRVI k-1000 k1000 y0 y4]

Edited 29 Apr 2020 by glavanov