Programmable Controller User's Manual

9-7

Master

Slave

０１

０２

０３

０４０５０６０７１０１１１２１３１４１５１６１７２０２１

Slave

２０

２１

２２

２３２４２５７３７４７５７６７７

: Master station

Slave station number 01 to 77 : octal

63 slaves

: Slave station

Group C

This PC is the master of group A

while serving as a slave in group C.

Master

Slave

Group A

This PC is the master of group B while

serving as a slave in group C.

Group B

Master

Slave

Master

Slave

[2] Hierarchical link

When 2 sets of JW-21MN are mounted on the basic rack panel of the JW20/JW20H/JW30H,

hierarchical link communication is possible and can increase the number of stations.

- Pay attention to hierarchical link system consisting of more than two levels as it takes time for

communication between the stations at the highest level and at the lowest level.

- Though more than one JW-21MN can be mounted on single basic rack panel, they cannot

directly communicate with other stations beyond one network.

Remarks