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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
4.6 Communication Test
The transmission test and reception test are performed by connecting the QJ71DN91
and other DeviceNet devices with a communication cable. There is no restriction on
the node number setting of the communication counterpart.
Execute the test in the following sequence:
Start
Connect the QJ71DN91 and the DeviceNet
station of the communication counterpart
with a DeviceNet cable.
Check
the QJ71DN91's LEDs
Abnormal completion
See buffer memory address 62F
H
,
"hardware test result storage area."
Match the communication speed of the
QJ71DN91 with that of the DeviceNet station
of the communication counterpart.
(Set the mode switch between A and C.)
Turn ON the power of the network and the
power of the DeviceNet station of the
communication counterpart.
Normal completion
Turn ON the power of the QJ71DN91.
(The MS LED flashes in green.)
The MS LED illuminates in green.
The MS LED goes off and
the ERR. LED illuminates.
[LED display]
QJ71DN91
RUN
MS
NS
ERR.
QJ71DN91
RUN
MS
NS
ERR.
QJ71DN91
RUN
MS
NS
ERR.
Performing communication test
Normal completion
Abnormal completion
Flashes the MS LED.
Turns OFF the MS LED goes off.
Turns ON the ERR. LED illuminates.
Illuminates the MS LED in green.
Turns OFF the ERR. LED goes off.