How To Turn Off Com.err Led And To Read/Clear Error Information - Mitsubishi MELSEC-F User Manual

11 TROUBLESHOOTING

11.1.2 How to turn off COM.ERR LED and to read/clear error information

[COM.ERR] LED off request signal
BFM#1601=0001H
11 - 4
This section explains how to turn off [COM.ERR] LED and to read/clear error
information using a sequence program.
(1) How to turn off [COM.ERR] LED using input/output signals
The [COM.ERR] LED on the front of the Ethernet module is turned on when a
communication error occurs in an external device. (BFM#28...b4: ON)
(a) The [COM.ERR] LED is turned off by writing "0001H" to the off request
signal (BFM#1601).
0000H
[COM.ERR] LED on
BFM#28, b4
Error occurrence
(b) The off processing is performed by writing "0001
(c) The error information in the error log area of the buffer memory is not
cleared (deleted) even if "0001
(2) How to turn off [COM.ERR] LED on the "Ethernet diagnostics"
screen of FX Configurator-EN (See Section 11.2.2.)
(a) Clicking on the COM.ERR off button turns the [COM.ERR] LED off.
(b) The error information in the error log area of the buffer memory is not
cleared (deleted).
(3) Reading buffer memory to read error information
Read the error information stored in the buffer memory of Ethernet module.
The "Initial alarm code" and each connection's "Open alarm code" are stored in the
following buffer memory.
Initial error code
Error code for connection 1
Error code for connection 2
Error code for connection 3
Error code for connection 4
Error code for connection 5
Error code for connection 6
Error code for connection 7
Error code for connection 8
W
R R
0001H
0002H
(LED on) (LED off)
Error
occurrence occurrence
" is written to BFM#1601.
H
W
0001H 0002H
(LED off) (LED on)
(LED on)
Error Error
occurrence
" to BFM#1601.
H
BFM#105
BFM#124
BFM#134
BFM#144
BFM#154
BFM#164
BFM#174
BFM#184
BFM#194
MELSEC-F
R
11 - 4