Specifications

App - 52
Appendix 4.1.2 How to turn off COM.ERR. LED and to read/clear error information
This section explains how to turn off the [COM.ERR.] LED and to read/clear the error
information using the 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. (Input/output signal X1C: ON)
(a) The [COM.ERR.] LED is turned off by turning on the off request signal (Y17).
[COM.ERR.] LED of f request signal (Y17)
[COM.ERR.] LED on signal (X1C)
Error occurrence
(LED on)
(LED on)
(LED off)
Error
occurrence
Error
occurrence
Error
occurrence
(b) The off request is processed continuously while the off request signal (Y17) is
on.
(c) The error information in the error log area of the buffer memory is not cleared
(deleted) by turning the off request signal (Y17) is on.
(2) How to turn off [COM.ERR.] LED on the "Ethernet diagnostics" screen of GX
Developer (Refer to Appendix 4.2.1.)
(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) How to read/clear error information using the dedicated instructions
Error information can be read/cleared at arbitrary timing by using the following
dedicated instructions.
(a) Dedicated ERRRD instruction
Using this instruction, initial abnormal code information or open abnormal code
information can be read.
(b) Dedicated ERRCLR instruction
Using this instruction, it is possible to turn off the [COM.ERR.] LED and clear
the initial abnormal code/open abnormal code or the error log.
* For the details of the dedicated instruction, refer to the following manual.
Q Corresponding Ethernet Interface Module User's Manual (Basic)