Appendix
Application program
Explanation
PID_T parameter explanation
Maximum input is 13700 for K
thermocouple
Set from 1, reset after setting.
Kp, setting value will automatically write to
this variable after setting, users can adjust
themselves.
Ｔi, setting value will automatically write to
this variable after setting, users can adjust
themselves.
Td, setting value will automatically write to
this variable after setting, users can adjust
themselves.
Use a local variable for unused
Use a local variable for unused
D.2 Using CTH200 PLC Thermocouple PID Control Module Library
【Function introduction】
The "PID_setting" function library is specially designed to provide parameter setting for the
thermocouple PID expansion module (e.g., SM231-7TD, SM231-7TF). Integrate PID algorithm
inside the thermocouple PID module. No complex programming, but only needs to call
"PID_setting" library to set some simple parameters to use module, and the temperature control
is accurate.
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