Self-Diagnostics Function; Ch1 Self-Loopback Test - Mitsubishi MELSEC-Q Series User Manual

4 SET-UP AND PROCEDURE BEFORE OPERATION

4.8 Self-diagnostics Function

4.8.1 CH1 self-loopback test

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This section explains the self-diagnostics function designed to check the
communication function and hardware of the Web server module
Conduct a self-loopback test to check hardware including the communication function
of the CH1 (10BASE-T/100BASE-TX interface) of the Web server module.
(1) Operation mode setting for Web server module
(a) In "Switch setting for I/O and intelligent function module" of GX Developer,
set the mode to "CH1 Self-loopback test". (Switch 1: 0002
(b) Write the PLC parameters to the programmable controller CPU.
(2) Execution of CH1 self-loopback test
(a) When a cable has been connected to the CH1, disconnect it.
(b) Set the programmable controller CPU to a STOP status.
(c) Reset the programmable controller CPU.
(d) After the programmable controller CPU is reset, the following CH1 self-
loopback test is executed automatically.
This test checks whether data can be communicated in the Web server
module.
During the test, the ERR. LED flickers.
(3) Confirmation of CH1 self-loopback test result
(a) Check the CH1 self-loopback test result according to the ERR. LED status.
ERR. LED status
Off
On
(b) When the test is completed, set the mode to "Online" in "Switch setting for
I/O and intelligent function module" of GX Developer, and reset the
programmable controller CPU. (Switch 1: 0000
(c) When the test has failed, conduct the CH1 self-loopback test again.
If an error occurs again, a possible cause is the hardware fault of the Web
server module.
Please consult your local Mitsubishi service center or representative,
explaining a detailed description of the problem.
CH1 self-loopback test result
Completed
Failed
MELSEC-Q
)
H
)
H
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