Mitsubishi QJ71MB91 User Manual

11
TROUBLESHOOTING
11.1 Troubleshooting
11 - 2
9
PROGRAMMING
10
DEDICATED INSTRUCTIONS
11
TROUBLESHOOTINGAPPENDICESINDEX
Table11.1 Troubleshooting list of errors indicated by LEDs (Continued)
No. Symptom Check point Corrective action Reference
2 The ERR.LED turned on.
Check if the automatic communication
error status (X7/XF) is ON.
Refer to "Automatic communication error
status (X7/XF) turned on."
Turn off the ERR. LED.
This section
(2)-7
When the dedicated instruction is used,
check it for an error.
Refer to "Dedicated instruction failed."
Turn off the ERR. LED.
This section
(3)-2
Check the error code in the error log.
Take corrective actions for the error code.
Turn off the ERR. LED.
Section 11.4.1
Section 11.5
Refer to "Communication with target device is not available even if parameter setting
has been completed normally.".
This section
(3)-7
3
The NEU. LED does not
flash.
When using the automatic communication
function
Refer to "Automatic communication
operation status (X6/XE) does not turn
on." or "Automatic communication error
status (X7/XF) turned on.".
This section
(2)-5,(2)-7
When using a dedicated instruction
Refer to "Dedicated instruction is not
executed."
This section
(3)-1
When using the slave function
Refer to "The QJ71MB91 slave function
does not return a response message to
the request message."
This section
(3)-3
In use of the slave function, check the
station number in the request message
that is sent to the QJ71MB91.
Correct the station number.
CHAPTER 4
Section 6.6
4
The SD LED does not
flash during data
transmission.
The RD LED does not
flash during data
reception.
When using the automatic communication
function
Refer to "Automatic communication
operation status (X6/XE) does not turn
on." or "Automatic communication error
status (X7/XF) turned on.".
This section
(2)-5,(2)-7
When using a dedicated instruction
Refer to "Dedicated instruction is not
executed."
This section
(3)-1
When using the slave function
Refer to "The QJ71MB91 slave function
does not return a response message to
the request message."
This section
(3)-3

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English