User`s manual

10-2

Data link DL1 (master station) function

[1] Communication method of the data link DL1

The data link DL1 communicates between a master station and a slave station or slave stations, by

sending and receiving the data.

As the data link DL1 executes communication using single twisted pair cable, it is not possible to

communicate with all the connected stations at the same time. It communicates with the connecting

stations by allocating time from the master station to the each station, in order. Stations not sending are

receiving data.

[Example] In case of 3 sets of slave stations:

Master station Slave station 01

Slave station 03Slave station 02

I/O processing

PC processing

Data exchange

PC processing

Master station PC

(JW30H: JW-32CUM1)

I/O cycle

Master station

(JW-32CUM1)

Slave station 1

Slave station 2

Slave station 3

means sending station

means receiving station

I/O processing