Let me begin with a few general details.
I am new to Step7
I have read as many posts here about PIDs as I could.
I do not find an answer to my issue.
I have the Simatic PID Temp COntrol Manual.
I have read it.
I understand the basics of PID, but I do not think this is the issue.
I have no errors on the PLC. I have a setpoint, I have Man_On set to off with a false BOOL. I reset the block FB58 at COM_RST with a "first scan" BOOL.
I enabled the pulse generator as I need to use a temperature in from a thermocouple to control an electric air heater. A separate PID will run a similar loop to heat oil and a third will be used to control air pressure.
If I can get the first one to work I should be OK. I have some experience tuning PID, but this one will not even turn on.
The PV is 21 and the setpoint is 30. It has been at this point for one hour.
No output.
I am sure it is a small thing I have overlooked.
Any ideas?
I am new to Step7
I have read as many posts here about PIDs as I could.
I do not find an answer to my issue.
I have the Simatic PID Temp COntrol Manual.
I have read it.
I understand the basics of PID, but I do not think this is the issue.
I have no errors on the PLC. I have a setpoint, I have Man_On set to off with a false BOOL. I reset the block FB58 at COM_RST with a "first scan" BOOL.
I enabled the pulse generator as I need to use a temperature in from a thermocouple to control an electric air heater. A separate PID will run a similar loop to heat oil and a third will be used to control air pressure.
If I can get the first one to work I should be OK. I have some experience tuning PID, but this one will not even turn on.
The PV is 21 and the setpoint is 30. It has been at this point for one hour.
No output.
I am sure it is a small thing I have overlooked.
Any ideas?