Visual Check - Mitsubishi Electric MELSEC Q Series User Manual
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Also See for MELSEC Q Series:
- User manual (834 pages) ,
- Reference manual (674 pages) ,
- Programming manual (624 pages)
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6.2
Visual Check
Check the following:
(1) Checking LEDs of the master station
Check that no error occurs in the module using LEDs by the following procedure.
For LED indication and module status,
1.
2.
3.
4.
(2) Checking LEDs of a remote I/O station
Check that no error occurs in a remote I/O station using LEDs by the following procedure.
For troubleshooting of a remote device station, refer to the following.
1.
2.
3.
(3) Checking communication cables and wiring
Check that no error occurs in the communication cables, the connectors and terminating resistors are securely
connected, and the system is correctly wired. (
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Power on the system and check the RUN LED of the master station.
If the RUN LED does not turn on, troubleshoot with reference to the following.
Page 66, Section 6.3.1
Check the L RUN LED of the master station.
If the L RUN LED of the master station does not turn on, troubleshoot with reference to the following.
Page 66, Section 6.3.2
Check the ERR. LED of the master station.
If the ERR. LED of the master station is on or flashing, troubleshoot with reference to the following.
Page 67, Section 6.3.3
Check the L ERR. LED of the master station.
If the L ERR. LED of the master station is on or flashing, troubleshoot with reference to the following.
Page 68, Section 6.3.4
User's manual for the remote device station used
Check the PW LED of the remote I/O station.
If the PW LED of the remote I/O station does not turn on, troubleshoot with reference to the following.
Page 70, Section 6.4.1
Check the L RUN LED of the remote I/O station.
If the L RUN LED of the remote I/O station does not turn on, troubleshoot with reference to the following.
Page 71, Section 6.4.2
Check the L ERR. LED of the remote I/O station.
If the L ERR. LED of the remote I/O station is on or flashing, troubleshoot with reference to the following.
Page 71, Section 6.4.3
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Page 45, Section 4.3.
Page 49, Section 4.5)
CHAPTER 6 TROUBLESHOOTING
65
6
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Table of Contents
Troubleshooting
