8 TROUBLESHOOTING
MELSEC-Q
8 - 66 8 - 66
*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.
*14
: This applies to the CPU module with the serial No. of which first 5 digits are "04101" or later.
Error
Code
(SD0)
*1
Error Contents and Cause Corrective Action
Corresponding
CPU
2101
13 or more A-series special function
modules (except for the A1SI61) that
can initiate an interrupt to the CPU
module have been installed.
Reduce the A series special function
modules (except the A1SI61) that can
make an interrupt start to the CPU
module to 12 or less.
Qn(H)
13 or more special function modules
(not counting the A(1S)I61) capable of
sending an interrupt to the CPU
module have been installed.
Keep the number of special function
modules that can initiate an interrupt
(with the exception of the A(1S)I61
module) to 12 or fewer.
QnA
2102
7 or more A1SD51S have been
installed.
Keep the number of A1SD51S to 6 or
fewer.
Qn(H)
7 or more serial communication
modules (excludes A (1S) J71QC24)
have been installed.
Keep the number of serial
communication modules (excludes
A(1S)J71QU24) installed to 6 or fewer.
QnA
2103
• 2 or more QI60/A1SI61 modules are
loaded in a single CPU system.
• 2 or more QI60/A1SI61 modules are
set to the same control CPU in a
multiple CPU system.
• 2 or more A1SI61 modules are
loaded in a multiple CPU system.
• Reduce the number of QI60/A1SI61
modules loaded in the single CPU
system to one.
• Change the number of QI60/A1SI61
modules set to the same control
CPU to only one in the multiple CPU
system.
• Reduce the number of A1SI61
modules to only one in the multiple
CPU system. When using an
interrupt module with each QCPU in
a multiple CPU system, replace it
with the QI60. (Use one A1SI61
module + max. three QI60 modules
or only the QI60 modules.)
Qn(H)
*12
QnPH
2 or more QI60, A1SI61 interrupt
modules have been installed.
Install only 1 QI60, A(1S)I61 module.
Qn(H)
QnPRH
The QI60 is loaded. Remove the QI60. Rem
2 or more A1SI61 interrupt modules
have been installed.
Install only 1 AI61 module. QnA
2 or more QI60 modules are mounted. Reduce the QI61 modules to one.
Q00J/Q00/
Q01
*14
2 or more QI60 modules where
interrupt pointer setting has not been
made are mounted.
• Reduce the QI60 modules to one.
• Make interrupt pointer setting to the
second QI60 module and later.
Q00J/Q00/
Q01
*12
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