User`s manual

Troubleshooting Error code list
11 – 42
2106
SP. UNIT LAY ERR.
– Two or more MELSECNET/H modules were
installed.
– Two or more Ethernet modules were installed.
– Three or more CC-Link modules were
installed.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Reduce the MELSECNET/H modules to one.
– Reduce the Ethernet modules to one.
– Reduce the CC-Link modules to two or less.
OFF Flicker Stop Q00J/Q00/Q01
SP. UNIT LAY ERR.
– The same network number or same station
number is duplicated in the MELSECNET/H
network system.
 Collateral information

Common Information: Module No.
(Steckplatz)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Check the network number and station
number.
OFF Flicker Stop Q00J/Q00/Q01
Qn(H)
QnPH
QnPRH
2107
SP. UNIT LAY ERR.
The start X/Y set in the PLC parameter’s I/O
assignment settings is overlapped with the one
for another module.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Make the PLC parameter’s I/O assignment set-
ting again so it is consistent with the actual sta-
tus of the intelligent function module/special
function modules.
OFF Flicker Stop )
2108
SP. UNIT LAY ERR.

Network module A1SJ71LP21, A1SJ71BR11,
A1SJ71AP21, A1SJ71AR21, or A1SJ71AT21B
dedicated for the A2USCPU has been
installed.
 • Network module A1SJ71QLP21 or
A1SJ71QBR11 dedicated for the Q2ASCPU
has been installed.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Replace the network module for the A2USCPU or
the network module for the Q2ASCPU with the
MELSECNET/H module.
OFF Flicker Stop Qn(H)
2110
SP UNIT ERROR
– 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 by the FROM/TO
instruction.
– The intelligent function module/special func-
tion module, Network module being accessed
is faulty.
– Station not loaded was specified using the
instruction whose target was the CPU share
memory.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: Program error loca-
tion
 Diagnostic Timing
When instruction executed
– Read the individual information of the error
using the GX (IEC) Developer, check the
FROM/TO instruction that corresponds to that
numerical value (program error location), and
correct when necessary.
– The intelligent function module/special func-
tion module that was accessed is experienc-
ing a hardware fault. Therefore, change the
faulty module. Alternatively, contact your local
Mitsubishi representative.
OFF/ON Flicker/
ON
Stop/
Continue
(can be set
in the
parameters
at error
occur-
rence)
Q00J/Q00/Q01
Qn(H)
(Function
version is B or
later)
QnPH
QnPRH
QnU
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-4: Error code list (2000 to 2999) for PLC CPUs of MELSEC System Q