Posted 31 Mar 2020 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? Share this post Link to post Share on other sites
Posted 31 Mar 2020 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 Share this post Link to post Share on other sites
Posted 11 Apr 2020 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 ? Share this post Link to post Share on other sites
Posted 29 Apr 2020 (edited) 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 Share this post Link to post Share on other sites