User`s manual

Troubleshooting Error code list
11 – 38
2012
BASE LAY ERROR
– The GOT is bus-connected to the main base
unit of the redundant system.
The following errors are detected in the CPU
redundant system compatible with the extension
base unit.
– The base unit other than the Q6WRB is con-
nected to the extension stage No.1.
– The base unit is connected to any one of the
extension stages No.2 to No.7, although the
Q6WRB does not exist in the extension
stage No.1 .
– The other system CPU module is incompati-
ble with the extension base unit.
– The QA1S6B, QA6B or QA6ADP+A5B/
A6B is connected.
– The number of slots of the main base unit for
both systems is different.
– Information of the Q6WRB cannot be read
correctly.
 Collateral information

Common Information: Base No.
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Remove a bus connection cable for GOT con-
nection connected to the main base unit.
– Use the Q6WRB (fixed to the extension
stage No.1)
– Use the CPU module compatible with the
extension base unit for the other system.
– Do not use the Q5B, QA1S6B, QA6B or
QA6ADP+A5 B/A6B for the base unit.
– Use the main base unit which has the same
number of slots.
– Hardware failure of the Q6WRB.
Contact your local Mitsubishi representative.
OFF Flicker Stop QnPRH
(first 5 digits of
serial No. is
09012 or later)
2013
BASE LAY ERROR
Stage number of the Q6WRB is recognized as
other than extension stage No.1 in the redundant
system.
 Collateral information

Common Information: Base No.
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Hardware failure of the Q6WRB.
Contact your local Mitsubishi representative.
2020
EXT.CABLE ERR.]
The following errors are detected in the redun-
dant system.
– At power-on/reset, the standby system has
detected the error in the path between the
control system and the Q6WRB.
– The standby system has detected the error in
the path between the host system CPU and
the Q6WRB at END processing.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset/When an END instruction
executed
Check to see if the extension cable between the
main base unit and the Q6
WRB is connected
correctly.
If not, connect it after turning OFF the main base
unit where the extension cable will be connected.
If the cable is connected correctly, hardware of
the CPU module, Q6WRB, or extension cable
is faulty.
Contact your local Mitsubishi representative.
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