Could you check the pid parameters?

[onboardx 0]

Could you check the pid parameters? I didn't answer from pid.Why?

 

Edited 2 Jun 2016 by onboardx

[Luke.S 8]

From the PT_100 it looks like you're controlling an atmospheric temperature. That could fluctuate quickly in a duct/pipe in which case you might want a shorter sampling time. If the RTD is measuring from a large volume like a tank it will probably fluctuate more slowly so you want to increase sampling time so you don't wind up your integral. You need to tune with Kp to get the kind of response you require.

I haven't seen that small PID block before but the normal one on your previous post...

...is stuck on pre tuning. The reason for that is probably because all the gains are zero so there will be no response. Or the the PLC is not correctly connected on the feedback or actuator side.

If you are actually attempting to control a real process with this and your actuator is a heater of some kind, please make sure you monitor the temperature of the heater outside of the PLC and hard wire a redundant overheat alarm to shut off the heater power (MC). Otherwise this could be very dangerous if your PID goes funny or the PLC fails in some way.

P.S. The StartPID bit needs to be turned on which it isn't in that picture. 

Edited 8 Jun 2016 by Luke.S