markg
Member
I want to replace our current, old temperature controllers with something new. These controllers are ON/OFF, have fixed hysteresis, and drive SSRs. I thought of trying a PLC. I need some info before I buy.
I have experience driving SSRs using transistor outputs, so that part is fine.
Can a basic 8-input/8-sinking output PLC with an analog input module (thermocouple) be configured to do ON/OFF control with hysteresis? Would I have to devise ladder logic to do hysteresis, or is there often a hysteresis function?
The PLC I am looking at is low cost and does not have PID loop functionality, so that is out.
I have experience driving SSRs using transistor outputs, so that part is fine.
Can a basic 8-input/8-sinking output PLC with an analog input module (thermocouple) be configured to do ON/OFF control with hysteresis? Would I have to devise ladder logic to do hysteresis, or is there often a hysteresis function?
The PLC I am looking at is low cost and does not have PID loop functionality, so that is out.