User`s manual

Error code list Troubleshooting
MELSEC System Q, Hardware 11 – 45
2124
SP. UNIT LAY ERR.
– A module is mounted on the 65th slot or later
slot.
– A module is mounted on the slot whose
number is greater than the number of slots
specified at [Slots] in [Standard setting] of
the base setting.
– A module is mounted on the slot whose
number of I/O points exceeds 4096 points.
– A module is mounted on the slot whose
number of I/O points strides 4096 points.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Remove the module mounted on the 65th slot
or later slot.
– Remove the module mounted on the slot
whose number is greater than the number of
slots specified at [Slots] in [Standard setting]
of the base setting.
– Remove the module mounted on the slot
whose number of I/O points exceeds 4096
points.
– Replace the module with the one whose
number of occupied points does not exceed
4096 points.
OFF Flicker Stop Qn(H)
QnPH
QnPRH
QnU (except
Q00UJ-, Q00U-,
Q01U and
Q02UCPU)
SP. UNIT LAY ERR.
– A module is mounted on after the 25th slot
(or after the 17th slot for the Q00UJCPU).
– A module is mounted on the slot whose
number is later than the one set in the "Base
setting" on the I/O assignment tab of PLC
parameter in GX (IEC) Developer.
– A module is mounted on the slot for which I/O
points greater than 1024 (greater than 256 for
the Q00UJCPU) is assigned.
– A module is mounted on the slot for which I/O
points is assigned from less than 1024 to
greater than 1024 (from less than 256 to
greater than 256 for the Q00UJCPU).
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Remove the module mounted on after the
25th (or after the 17th slot for the
Q00UJCPU).
– Remove the module mounted on the slot
whose number is later than the one set in the
"Base setting" on the I/O assignment tab of
PLC parameter in GX (IEC) Developer.
– Remove the module mounted on the slot for
which I/O points greater than 1024 (greater
than 256 for the Q00UJCPU) is assigned.
– Replace the end module with the one whose
number of occupied points is within 1024
(within 256 for the Q00UJCPU).
OFF Flicker Stop Q00UJ
Q00U/Q01U
SP. UNIT LAY ERR.
– A module is mounted on the 37th slot or later
slot.
– A module is mounted on the slot whose
number is greater than the number of slots
specified at [Slots] in [Standard setting] of
the base setting.
– A module is mounted on the slot whose
number of I/O points exceeds 2048 points.
– A module is mounted on the slot whose
number of I/O points strides 2048 points
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Remove the module mounted on the 37th slot
or later slot.
– Remove the module mounted on the slot
whose number is greater than the number of
slots specified at [Slots] in [Standard setting]
of the base setting.
– Remove the module mounted on the slot
whose number of I/O points exceeds 2048
points.
– Replace the module with the one whose
number of occupied points does not exceed
2048 points.
OFF Flicker Stop Q02U
SP. UNIT LAY ERR.
– A module is mounted on the 25th slot or later
slot. (The 17th slot or later slot for the
Q00JCPU.)
– A module is mounted on the slot whose
number is greater than the number of slots
specified at [Slots] in [Standard setting] of
the base setting.
– A module is mounted on the slot whose
number of I/O points exceeds 1024 points.
(256 points for the Q00JCPU.)
– A module is mounted on the slot whose
number of I/O points strides 1024 points.
(256 points for the Q00JCPU.)
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Remove the module mounted on the 25th slot
or later slot. (The 17th slot or later slot for the
Q00JCPU.)
– Remove the module mounted on the slot
whose number is greater than the number of
slots specified at [Slots] in [Standard setting]
of the base setting.
– Remove the module mounted on the slot
whose number of I/O points exceeds 1024
points. (256 points for the Q00J.)
– Replace the module with the one whose
number of occupied points does not exceed
1024 points. (256 points for the Q00J.) über-
schreitet, gegen eines mit weniger E/As
OFF Flicker Stop Q00J
Q00/Q01
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