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MELSEC-Q
8 TROUBLESHOOTING
Error
code
(SD0)
Error contents and cause Corrective action
LED status,
Remote I/O
operation status
2100
[SP. UNIT LAY ERR.]
• In the I/O Assignment tab of the PLC parameter
dialog box, "Intelligent" (intelligent function module) is
set for the slot where an I/O module is mounted, and
vice versa.
• In the I/O assignment setting of the PLC parameter,
switch setting was made to the module that has no
switch setting.
• In the I/O assignment setting of the PLC parameter
dialog box, the number of points assigned to the
intelligent function module is less than the number of
points of the mounted module.
[NET/10 mode]
• In the I/O Assignment tab of the PLC parameter
dialog box or the I/O assignment setting of the
network parameter, "Intelligent" (intelligent function
module or special function module) is set for the slot
where an I/O module is mounted, and vice versa.
• In the I/O assignment setting of the PLC parameter,
switch setting was made to the module that has no
switch setting.
• In the I/O assignment setting of the PLC parameter
dialog box or the I/O assignment setting of the
network parameter, the number of points assigned to
the intelligent function module (special function
module) is less than the number of points of the
mounted module.
Collateral information
• Common Information (SD5 to SD15): Module No.
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• At power-on/At reset
*2
• Set the I/O assignment again so that the
setting matches with the mounting status of
the intelligent function module or the remote
I/O module.
• Delete the switch setting in the I/O
assignment setting of the PLC parameter.
[NET/10 mode]
• Set the I/O assignment of the PLC
parameter or the I/O assignment of the
network parameter again so that the setting
matches with the mounting status of the
intelligent function module (special function
module) or the remote I/O module.
• Delete the switch setting in the I/O
assignment setting of the PLC parameter.
REM: Off
ERR: On
Remote I/O status:
Stop
2103
[SP.UNIT LAY ERR.]
The QI60 is mounted.
Collateral information
• Common Information (SD5 to SD15): Module No.
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• At power-on/At reset
*2
Remove the QI60.
REM: Off
ERR: On
Remote I/O status:
Stop
2106
[SP.UNIT LAY ERR.]
• Five or more Q series Ethernet modules are
mounted.
• 65 or more Q series CC-Link modules are mounted.
Collateral information
• Common Information (SD5 to SD15): Module No.
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• At power-on/At reset
*2
• Reduce the number of the Q series
Ethernet modules to four or less.
• Reduce the number of the Q series CC-Link
modules to 64 or less.
REM: Off
ERR: On
Remote I/O status:
Stop