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MELSEC-Q
4 SETTING AND PROCEDURE BEFORE OPERATION
4.10.4 Communication test
This test checks whether communications is normally performed between the host
station and a communication-target station (specified with the network number and
station number).
If the communication-target station is in another network, the relay network number
and station number are displayed and the routing parameter settings can be checked.
Host
1R1 1R2
Network No. 1
1R4 1R3
2NS12NS3
Network No. 2
2N
S62NS4
1MR 2M
P22NS5
3M
P
1
3N
S
3
3N
S
53N
S
4
3N
S
2
4N
S
5
4M
P1
4N
S
2
Network No. 4
4N
S
64N
S
4
Destination
Network No. 3
4N
S
3
GX Developer
When the communication test is performed from GX Developer connected to the 2M
P
2
in network number 2 to the 4N
S
6 in network number 4 in the system above, the
following screen appears. The result shows that communications between two stations
is normal.
Forward path from the host
to the destination
Return path from the destination
to the host
Station numbers of
relay stations.
5 is the station No. o
f
network No. 2 side.
1 is the station No. o
f
network No. 3 side.