User`s manual

Troubleshooting Error code list
11 – 34
1414
CONTROL-BUS ERR.
– Fault of a loaded module was detected.
– In a multiple CPU system, a CPU module
incompatible with the multiple CPU system is
mounted.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
Always
– Remove the CPU module incompatible with
the multiple CPU system from the main base
unit, or replace the CPU module with a CPU
module compatible with the multiple CPU
system.
– Reset the CPU module and RUN it again. If the
same error is displayed again, the intelligent
function module, CPU module or base unit is
faulty.
Contact your local Mitsubishi representative.
OFF Flicker Stop Q00J/Q00/Q01
(Function
version is B or
later)
Qn(H)
(Function
version is B or
later)
QnPH
QnU
CONTROL-BUS ERR.
An error is detected on the system bus.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
Always
Reset the CPU module and RUN it again. If the
same error is displayed again, the intelligent
function module, CPU module or base unit is
faulty.
Contact your local Mitsubishi representative.
Q00J/Q00/Q01
(Function
version is B or
later)
Qn(H)
QnPH
QnPRH
QnU
1415
CONTROL-BUS ERR.
Fault of the main or extension base unit was
detected.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
When an END instruction executed
Reset the CPU module and RUN it again. If the
same error is displayed again, the intelligent
function module, CPU module or base unit is
faulty.
Contact your local Mitsubishi representative.
OFF Flicker Stop Q00J/Q00/Q01
Qn(H)
(Function
version is B or
later)
QnPH
QnPRH
QnU
CONTROL-BUS ERR.
Fault of the main or extension base unit was
detected.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset/When an END instruction
executed
Qn(H) (first 5
digits of serial
No. is 08032 or
later)
QnPH (first 5
digits of serial
No. is 08032 or
later)
1416
CONTROL-BUS ERR.
System bus fault was detected at power-on or
reset.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Reset the CPU module and RUN it again. If the
same error is displayed again, the intelligent
function module, CPU module or base unit is
faulty.
Contact your local Mitsubishi representative.
OFF Flicker Stop Qn(H)
(Function
version is B or
later)
QnPH
QnU
CONTROL-BUS ERR.
In a multiple CPU system, a bus fault was detec-
ted at power-on or reset.
 Collateral information

Common Information: Module No. (Slot No.)
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Q00/Q01
(Function
version is B or
later)
QnU
1417
CONTROL-BUS ERR.
A reset signal error was detected on the system
bus.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
Always
Reset the CPU module and RUN it again. If the
same error is displayed again, the intelligent
function module, CPU module or base unit is
faulty.
Contact your local Mitsubishi representative.
OFF Flicker Stop QnPRH
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-3: Error code list (1000 to 1999) for PLC CPUs of MELSEC System Q