User`s manual

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CHAPTER 14 DATA COMMUNICATIONS USING EXTERNAL DEVICE AND PROGRAMMABLE CONTROLLER CPU M : N
CONFIGURATION
14
14.3 Examples of Procedure for Data Communications with the Programmable Controller CPU
14.3 Examples of Procedure for Data Communications with
the Programmable Controller CPU
The following uses examples to describe the procedure when communicating data with a programmable controller
CPU by interlocking the external devices.
14.3.1 Sequential data communications between external devices
and the programmable controller CPU
The external devices sequentially obtain the line usage right and communicate data with the programmable controller
CPU based on their station No.
The following uses an example to describe the procedure when external devices communicate data with the
programmable controller CPU.
: External device that obtained the line usage right
Transmission to transfer
the line usage right
Data communications
with the programmable
controller CPU
Station No. 1BH
external device
Time
Station No. 1CH
external device
Station No. (m-1)
external device
Response
CPU
CPU CPU CPU
C24C24C24C24
§
1 33
2-a)
3
External device
(Station No.: 1BH)
(Station No.:0H)
(Station No.:1H)
When communicating
data with the station
No. 1H programmable
controller CPU
C24: Q series C24, QC24 (N), UC24
(Station No.:2H) (Station No.:15H)
External device
(Station No.: 1CH)
External device
(Station No.: 1DH)
External device
(Station No.: 1EH)