Mitsubishi QJ71LP21 Reference Manual page 283

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
The start X/Y set in the PLC
parameter's I/O assignment settings is
2107
overlapped with the one for another
module.
• Network module A1SJ71LP21,
A1SJ71BR11, A1SJ71AP21,
A1SJ71AR21, or A1SJ71AT21B
dedicated for the A2USCPU has
been installed.
2108 • Network module A1SJ71QLP21 or
A1SJ71QBR11 dedicated for the
Q2AS has been installed.
A(1S)J71LP21 or A(1S)J71BR11 for
use with the AnUCPU network module
has been installed.
The control system and standby
system module configurations are
2109
different when a redundant system is
in the backup mode.
• The location designated by the
FROM/TO instruction set is not the
intelligent function module/special
function module.
• The module that does not include
buffer memory has been specified
2110 by the FROM/TO instruction.
• The intelligent function module/
special function module, Network
module being accessed is faulty.
• Station not loaded was specified
using the instruction whose target
was the CPU share memory.
• The location designated by a link
direct device (J \ ) is not a network
module.
• The I/O module (intelligent function
2111
module/special function module)
was nearly removed, completely
removed, or mounted during
running.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
*12 : This applies to the CPU module of function version B or later.
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Corrective Action
Make the PLC parameter's I/O
assignment setting again so it is
consistent with the actual status of the
intelligent function module/special
function modules.
Replace the network module to
MELSECNET/H module.
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 intelligent function module/
special function module that was
accessed is experiencing a
hardware fault. Therefore, change
the faulty module. Alternatively,
contact your local Mitsubishi
representative.
MELSEC-Q
Corresponding
CPU
Rem
Qn(H)
QnA
Q4AR
Q00J/Q00/Q01
*12
Qn(H)
QnPH
QnPRH
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