Mitsubishi QJ71MT91 User Manual

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MELSEC-Q
11 TROUBLESHOOTING
Occurrence Error
Code
Error Name Description Lit LED Corrective Action
1) 2) 3) 4) 5)
73B1H
PING test
setting error
The settings (communication
time check, transmission
count, IP address) of the PING
test are incorrect.
COM.ERR.
Review the settings of the PING
test.
73C0H RAM error
An error was detected in the
RAM test.
ERR.
73C1H ROM error
An error was detected in the
ROM test.
ERR.
73C2H
Self-loopback
test error
An error was detected in the
self-loopback test.
COM.ERR.
Counter the problem in the
following procedure.
• Check whether or not the
QJ71MT91, power supply
module and CPU module are
mounted correctly on the base
unit.
• Check whether or not the
operating environment of the
system is within the range of
general specifications of the
CPU module.
• Check whether the power
capacity is sufficient or not.
• Perform the test again.
• If the above does not solve the
problem, a probable cause is a
hardware error.
Check if the programmable
controller CPU and base unit
are normal referring to the
manual for each module.
Or, replace either of the
modules to check the operation.
In case of failure, please consult
your local Mitsubishi system
service center or representative,
explaining a detailed description
of the problem.
73C8H
In the offline mode, parameters
were set by GX Configurator-
MB.
COM.ERR.
In the offline mode, delete GX
Configurator-MB parameters set
in the programmable controller
CPU.
73C9H
In the offline mode, Basic
parameter setting request (Y1)
was turned on.
COM.ERR.
Do not turn on Basic parameter
setting request (Y1) in the offline
mode.
73CAH
In the offline mode, Automatic
communication parameter
setting request/Automatic
communication start request
(Y4) was turned on.
COM.ERR.
Do not turn on Automatic
communication parameter setting
request/Automatic
communication start request (Y4)
in the offline mode.
73CBH
Offline mode
error
In the offline mode, Automatic
communication stop request
(Y6) was turned on.
COM.ERR.
Do not turn on Automatic
communication stop request (Y6)
in the offline mode.
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Mitsubishi QJ71MT91 Specifications

General

Brand	Mitsubishi
Model	QJ71MT91
Category	Controller
Language	English