Checking The Module Status (Hardware Test) - Mitsubishi MELSEC Q Series User Manual

7 PROCEDURE BEFORE STARTING THE DATA LINK

7.4 Checking the Module Status (Hardware Test)

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The hardware test checks whether or not each module works properly by itself. Always
perform this hardware test before configuring the system and for each module by itself
without connecting the cable. Otherwise, the hardware test will not be executed
properly.
Execute the hardware test using the following procedure.
Connect the terminal resistor attached to the
module between the DA and DB terminals of
the master/local module.
Check items prior to turning the power ON:
Check the module installation status
Check the input power voltage
Verify that the PLC CPU RUN/STOP switch is
set to "STOP"
Verify that the PLC CPU RESET switch is set
to the "Middle position"
Set the "transmission rate/mode setting
switch" for the master/local module to "A to E
(the transmission rate should be the same as
when the system is operating)".
Operate the PLC CPU RESET switch according
to the following procedure.
1) Set the RESET switch to RESET.
RESET
2) Set the RESET switch to the middle position.
RESET
"MST" LED is flashing (test in progress)
Start
Power ON
L.CLR
L.CLR
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