User`s manual

Troubleshooting Error code list
11 – 44
2116
SP UNIT ERROR
– An instruction that does not allow the intelli-
gent function module under the control of
another CPU to be specified is being used for
a similar task.
– Instruction was executed for the A or QnA
module under control of another CPU.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: Program error loca-
tion
 Diagnostic Timing
When instruction executed/STOP → RUN
Read the individual information of the error
using the GX (IEC) Developer, check the program
corresponding that value (program error loca-
tion), and make correction.
OFF/ON Flicker/
ON
Stop/
Continue
Q00J/Q00/Q01
(Function
version is B or
later)
Qn(H)
(Function
version is B or
later)
QnPH
QnU
2117
SP UNIT ERROR
A CPU module that cannot be specified in the
instruction dedicated to the multiple CPU system
was specified.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: Program error loca-
tion
 Diagnostic Timing
When instruction executed/STOP → RUN
Read the individual information of the error
using the GX (IEC) Developer, check the program
corresponding that value (program error loca-
tion), and make correction.
OFF/ON Flicker/
ON
Stop/
Continue
2118
SP UNIT ERROR
When the online module change setting is set to
be "enabled" in the PLC parameter in a multiple
CPU system, intelligent function module con-
trolled by other CPU using the FROM/TO instruc-
tions is specified.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: Program error loca-
tion
 Diagnostic Timing
When instruction executed
– When performing the online module change
in a multiple CPU system, correct the pro-
gram so that access will not be made to the
intelligent function module controlled by the
other CPU.
– When accessing the intelligent function mod-
ule controlled by the other CPU in a multiple
CPU system, set the online module change
setting to be "disabled" by parameter.
OFF/ON Flicker/
ON
Stop/
Continue
Qn(H)
(Function
version is B or
later)
QnPH
QnU (except
Q00UJ-, Q00U-,
Q01U and
Q02UCPU)
2120
SP. UNIT LAY ERR.
The locations of an extrension base unit is
improper.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Check the location of the base unit.
OFF Flicker Stop Q00J/Q00/Q01
(Version A)
Qn(H)
QnPH
2121
SP. UNIT LAY ERR.
The CPU module is installed to other than the
CPU slot and slots 0 to 2.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Check the loading position of the CPU module
and reinstall it at the correct slot.
OFF Flicker Stop Qn(H)
QnPH
2122
SP. UNIT LAY ERR.
The QA1S6B/QA6B or QA6ADP+A5B/
A6B are used for the main base unit.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Replace the main base unit with a usable one (for
MELSEC System Q).
OFF Flicker Stop Qn(H)
QnPH
QnPRH
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