Mitsubishi Electric Q26UD(E)HCPU User Manual page 411

Error
Error and cause
code
[PID ERROR]
Data in the system area used for auto tuning (limit
cycle method) have been overwritten.
■Collateral information
9120
• Common information: Program error location
• Individual information: -
■Diagnostic timing
• When instruction executed
[PID ERROR]
The operation result is abnormal because the auto
tuning (limit cycle method) measurement time has
>,  <0, <0)
exceeded. (
ON ON
9121
■Collateral information
• Common information: Program error location
• Individual information: -
■Diagnostic timing
• When instruction executed
[PID ERROR]
• The proportional gain (K
tuning (limit cycle method) is out of the range, 0
to 32767.
• The rate of change in the process value (PV) is
9122
smaller compared with that in the output value.
■Collateral information
• Common information: Program error location
• Individual information: -
■Diagnostic timing
• When instruction executed
[PID ERROR]
• The integral time (T ) resulted from auto tuning
I
(limit cycle method) is out of the range, 0 to
32767.
• The auto tuning time is longer than necessary.
9123
■Collateral information
• Common information: Program error location
• Individual information: -
■Diagnostic timing
• When instruction executed
[PID ERROR]
• The derivative time (T
D
tuning (limit cycle method) is out of the range, 0
to 32767.
• The auto tuning time is longer than necessary.
9124
■Collateral information
• Common information: Program error location
• Individual information: -
■Diagnostic timing
• When instruction executed
[CONT. UNIT ERROR]
In the multiple CPU system, an error occurred in
the CPU module other than the Process CPU and
High Performance model QCPU.
10000 ■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• Always
*1 For the Basic model QCPU, this LED can be turned on/off using the LED control function. (For the High Performance
model QCPU, Process CPU, Redundant CPU, Universal model QCPU, and LCPU, the LED can only be turned off.)
User's Manual (Function Explanation, Program Fundamentals) for the CPU module used
*2 The product name is the MELSEC- Q series compatible PC CPU module bus interface driver software package.
*3 The Basic model QCPU does not have the USER LED.
Check that data in the system area occupied
by the PID instructions are not overwritten.
Increase the difference between the output
upper limit and lower limit (ULV-LLV) for auto
tuning, or set a smaller value to the input filter
constant () or the PV threshold (SH
Then, check the result again.
) resulted from auto
P
Multiply the process value (PV) by ten so that
the rate of change in the PV increases during
auto tuning.
Increase the difference between the output
upper limit and lower limit (ULV-LLV) for auto
tuning, or set a smaller value to the input filter
constant () or the PV threshold (SH
Then, check the result again.
) resulted from auto
Increase the difference between the output
upper limit and lower limit (ULV-LLV) for auto
tuning, or set a smaller value to the input filter
constant () or the PV threshold (SH
Then, check the result again.
To check the details of the error, connect a
programming tool to the corresponding CPU
module.
Corrective action
RUN: On
ERR.:On
CPU Status:Continue
RUN: On
ERR.:On
).
PV
CPU Status:Continue
RUN: On
ERR.:On
CPU Status:Continue
RUN: On
ERR.:On
).
PV
CPU Status:Continue
RUN: On
ERR.:On
).
PV
CPU Status:Continue
RUN: Off
ERR.:Flashing
CPU Status:Continue
APPENDICES
LED status, Corresponding
CPU status CPU
LCPU
QnUDV
LCPU
QnUDV
LCPU
QnUDV
LCPU
QnUDV
LCPU
QnUDV
Qn(H)
QnPH
409
A