User`s manual

11-11
Data link DL9 (master station) function
11
[2] PC process and communication timing
The data link DL9 communicates asynchronize with master station PC and slave station PC. To exchange
data between DL9 buffer memory and each of PC data memory, synchronize with the PC process.
The configuration of the data link DL9 in the JW-32CUM1 is the same as the data link DL1. - See page
10-9.
Remarks
- The processing flow of a slave station is the same as those of a master station. The master station
alters slave station numbers to communicate.
- Data exchange time between a PC and a link module (data link DL9) in general is shown in the
below.
Scanning time of the PC master station and the PC slave station becomes long only for this time.
- Buffer memory of the data link DL9 is renewed in each processing cycle of the PC. Accordingly,
the ON signal shorter than a communication cycle may not be sent.
PC model
Data exchange time
JW30H
JW20/20H
W70H/100H
JW50/70/100
JW50H/70H/100H
Approx. 2 ms
Approx. 0.5 ms *
Approx. 0.5 ms
Approx. 6 ms
Approx. 0.1 ms
JW-31CUH1/32CUH1/33CUH1/33CUH2/33CUH3
JW-32CUM1
JW-31CUH/32CUH/33CUH
*: In case of using basic rack panel, JW-34KB/36KB/38KB.
If a JW-24KB, JW-26KB or JW-28KB is used, the data exchange time will be approximately
2 ms.
Master station
PC I/O cycle
(control section)
Data exchange
Data link master station
Communication
with slave module
Slave station 05
PC I/O cycle
of slave station 05
Data
exchange
Communication data turns OFF here.
I/O input
ON
OFF
1 cycle ON
Slave
station1
Slave
station2
Slave
station3
Slave
station4
Slave
station5
Slave
station5
Slave
station6
Slave
station7
Slave
station8
(general purpose
communication section)
JW-32CUM1