Chapter 7 Usage of Various Functions
7-
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a) Error codes of auto-tuning function block (PID8AT)
The following table shows error codes and descriptions of PID8AT instruction.
Error code
(STAT output)
Description Countermeasure
0 Normal operation
1 SV is out of range Change the SV within 0 ~ 4000
2 PV is out of range
It may caused by fault of A/D module. Check the A/D
module.
3 S_TIME is out of range Change the S_TIME within 0 ~ 100
32 Ripple is out of range Change the Ripple to 0 Or 1.
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