Experimental Physics and
Industrial Control System

Hi all,

   

    After the motor drived by PI C863 hit the limit switch and stopped, it would be commanded to leave the limit switch and should move in reverse direction. But the motor record often stopped immedietely as the moving started, and the motor actually did move on the command. The motor record seemed to restart after the “STOP/GO” button is pressed. Sometimes the button didn’t work too.

   

    The debug information showed that the direction status and the limit switch status in C863 couldn’t change when the motor record queried C863 first time. So the motor record thought no motor in moving , then wait forever. Even if we reduced the scan rate, the problem still occurred. The engineer from PI told us the time in which the direction status changed was not sure, and it depended on the difference between the current position and the origin position from the encoder.

 

    Is there any ways to resolve the problem?

 

 

Mi Qingru

SSRF