Chapter 7 Usage of Various Functions
7-
ొె
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.