High−level Instructions
3 − 354
Sending data to a PLC on a different hierarchical level
What is a hierarchical link?
A hierarchical link functions as a relay station between two link units installed on the same backplane,
enabling communication between CPUs belonging to different networks.
Example: Communicating with a CPU at depth 1
Local
station
Power
CPU
Link
Link
Relay
station
Remote
station
Unit of relay source
Unit of relay
destination
Unit of remote station
Depth 0
Power
CPU
Link
Depth 1
Power
CPU
Link
In this way, by passing data through a relay station, communication is possible to a depth of 3.
Note
When using the MEWNET−P and MEWNET−W, data can only be
relayed one network deeper in the hierarchy.
To Next Page