Mitsubishi Electric MELSEC-Q/L - Page 733

7 APPLICATION INSTRUCTIONS
7.18 PID Instruction
731
7
Precautions
• The instruction can be executed multiple times (no limit in the number of loops). However, be careful not to duplicate (S3)
used for operation and the device number specified by (D).
Operation error
• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4101 The device specified by (S3) exceeds the range of the number of device
points.

9100 A data error occurred in the control parameter setting values or during PID
operation because the sampling time (T
s
) is out of the target range (T
s
0).

9101 A data error occurred in the control parameter setting values or during PID
operation because the input filter constant () is out of the target range (<0
or 100).

9102 A data error occurred in the control parameter setting values or during PID
operation because the proportional gain (K
P
) is out of the target range
(K
P
<0).

9103 A data error occurred in the control parameter setting values or during PID
operation because the integral time (T
I
) is out of the target range (T
I
<0).

9104 A data error occurred in the control parameter setting values or during PID
operation because the derivative gain (K
D
) is out of the target range (K
D
<0 or
201  K
D
).

9105 A data error occurred in the control parameter setting values or during PID
operation because the derivative time (T
D
) is out of the target range (T
D
<0).

9106 Sampling time (T
S
)  operation cycle 
9107 Rate of change in the process value went out of the range (PV<-32768 or
32767<PV).

9108 Error value went out of the range (EV<-32768 or 32767<EV). 
9109 Integrally calculated value went out of the range (from -32768 to 32767). 
9110 Derivative value went out of the range because derivative gain (K
D
) went out
of the range.

9111 Derivatively calculated value wend output of the range (from -32768 to
32767).

9112 PID operation result went out of the range (from -32768 to 32767). 
9113 PID output upper limit setting value<output lower limit setting value 
9114 Error in the setting value of alert for rate of change in PID input or in the
setting value of alert for rate of change in output(setting value<0)

9115 The result of auto tuning by the step response method is improper as
follows.
• The error at the start of auto tuning is 150 or less.
• The error at the end of auto tuning is 1/3 of that at the start of auto tuning.

9116 A mismatch occurred in the action direction of auto tuning by the step
response method.
• A mismatch occurred between the action direction assumed from the
process value at the time of starting auto tuning and the direction actual
action by auto tuning output.

9117 Auto tuning by the step response method is faulty as follows.
• Auto tuning failed to operate correctly because the set value fluctuated
during auto tuning.

9118 Auto tuning by the limit cycle method resulted in an error in the values set for
auto tuning output as follows.
• ULV (upper limit)  LLV (lower limit)

9119 Auto tuning by the limit cycle method resulted in an error in the values set for
the auto tuning PV threshold (hysteresis) as follows.
•SH
PV
<0

9120 Auto tuning by the limit cycle method resulted in an error in the auto tuning
transition status as follows.
• The data in the device that controls the transition status has been rewritten
abnormally.
