Routing Function - Mitsubishi Electric Q Series Reference Manual

7 APPLICATION FUNCTIONS

7.4.2 Routing function

Target
network No.
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The routing function is used to execute transient transmissions to stations having other
network numbers in a multiple network system.
In order to execute the routing function, it is necessary to set the "routing parameters"
to associate the network numbers of the request source and the station that will
function as a bridge between the networks. 1
(1) Stations that require routing parameter setting
(a) The setting is required for both the transient transmission request source
and relay stations.
(b) For the relay stations, two routing settings are required: one from the
request source to the request destination, and the other from the request
destination back to the request source.
(c) The setting is not required for the request destination.
In the example shown in the diagram below where the transient transmission is
executed from 1N
1) Setting for 1N
Target network No. (3) of the Transfer to, the relay station (1N
the relay network No. (1) to the relay station.
2) Setting for 1N
Target network No. (3) of the Transfer to, the relay station (2N
the relay network No. (2) to the relay station. It is not necessary to set
the return route because it is designated in the setting for 2N
3) Setting for 2N
It is not necessary to set the routing to the Transfer to because the host
is on the same network as the destination transfer (3). However, it is
necessary to set the Transfer from network No. (1) as the Target
network No. and to designate the relay station (2M
network No. (2) to the relay station in order to trace a route back to the
request source.
Request
source
1M 1 1N 2 1N 3
P S S
Network No. 1
1N 6 1N 5 1N 4
S
S S
Routing parameter setting
Relay Relay
network No. station No.
3 2 4
1: The bridge function refers to sending data via an adjacent network.
3 to 3N 4, the setting is required for the following three stations:
S S
3 that requests the transient transmission
S
4 that functions as a bridge
S
4 that function as a bridge
S
Routing parameter setting
Target Relay Relay
network No. network No. station No.
3 1 4
3M
2M 1 2N 4 3N
P S
Network No. 2
2N 2 2N 3
S S
···· Stations for which the
routing parameters are set
P
The setting is required
only for the target network
No. (3).
1 3N 2
P S
Network No. 3
5 3N 4 3N 3
S
S S
Request
destination
Routing parameter setting
Target Relay Relay
network No. network No. station No.
1 2 1
MELSEC-Q
4), and
S
4), and
S
4.
S
1) and the relay
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