Mitsubishi Q2ACPU User Manual page 369

22. TROUBLE SHOOTING
Error
Error Contents and Cause
Code
[SP. UNIT LAY ERR.]
A(1S)J71LP21 or A(1S)J71BR11 for use with the
AnUCPU network module has been installed.
■Collateral informationmmon
2108
• Common Information:Module No.(Slot No.)
• Individual Information:–
■Diagnostic Timing
• At power ON/At reset
[SP. UNIT LAY ERR.]
The control system and standby system module
configurations are different when a redundant
system is in the backup mode.
2109 ■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:–
■Diagnostic Timing
• At power ON/At reset
[SP. UNIT ERROR]
• The location designated by the FROM/TO
instruction set is not the special function module.
• The module that does not include buffer memory
has been specified by the FROM/TO instruction.
• The special function module, Network module
being accessed is faulty.
2110
• Station not loaded was specified using the
instruction whose target was the CPU share
memory.
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:Program error location
■Diagnostic Timing
• When instruction executed
[SP. UNIT ERROR]
• The location designated by a link direct device
(J \ ) is not a network module.
• The I/O module (special function module) was
nearly removed, completely removed, or
2111
mounted during running.
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:Program error location
■Diagnostic Timing
• When instruction executed
[SP. UNIT ERROR]
• The module other than special function module is
specified by the special function module
dedicated instruction.
Or, it is not the corresponding special function
module.
• The module model specified by the special
function module dedicated instruction and that
2112
specified by the parameter I/O assignment is
different.
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:Program error location
■Diagnostic Timing
• When instruction executed/STOP
*1 CPU operation can be set in the parameters at error occurrence. (LED indication varies.)
*2 The BAT.ALM LED turns on at BATTERY ERROR.
Corrective Action
Replace the network module to A(1S)J71QLP21 or
A(1S)J71QBR11.
Check the module configuration of the standby
system.
• Read the individual information of the error using
the GX Developer, check the FROM/TO
instruction that corresponds to that numerical
value (program error location), and correct when
necessary.
• The special function module that was accessed
is experiencing a hardware fault. Therefore,
change the faulty module. Alternatively, contact
your local Mitsubishi representative.
• Read the individual information of the error using
a peripheral device, and check the special
function module dedicated instruction (network
instruction) that corresponds to the value
(program error part) to make modification.
• Set the module model by PLC parameter I/O
assignment according to the special function
module dedicated instruction setting.
Example) Although AJ71QC24N is used actually,
AJ71QC24 is set.
RUN
22 - 24
LED Status Corresponding
CPU Status CPU
RUN:
Off
ERR.:
Flicker QnA
CPU Status:
Stop
RUN:
Off
ERR.:
Flicker
Q4AR
CPU Status:
Stop/
*2
Continue
RUN:
Off/On
ERR.:
Flicker/On
QnA
CPU Status:
Stop/
*1
Continue