1 - 5 1 - 5
MELSEC
1 OVERVIEW
(4) Intelligent device station communication
The communication between the master station and the intelligent device station
uses two types of transmission methods: cyclic transmission and transient
transmission.
(a) Cyclic transmission
Handshaking signals with the intelligent device station (positioning start,
positioning end, etc.) are communicated using the remote input RX and
remote output RY. Numeric data (positioning start number, present feed
value, etc.) is communicated using the remote registers RWw and RWr.
Remote input
RX
Remote output
RY
mdReceive
mdSend
Master station
Personal computer
Intelligent device station
Link scan
Link scan
Read
Remote
register
RWw
mdSend
Link scan
Write
Link scan
Read
mdReceive
Remote
register
RWr
Remote input
RX
Remote output
RY
Remote
register
RWw
Remote
register
RWr
Write
Program
CC-Link Ver.2 board
(b) Transient transmission
Read and write operations can be performed for the intelligent device station
buffer memory at an arbitrary timing (using the mdReceive and mdSend
functions, respectively).
Master station
Personal computer
Intelligent device station
Transient
transmission
Transient
transmission
mdSend
mdReceive
Buffer memory
CC-Link Ver.2 board
Write
Read
Program
Summary of Contents for Q80BD-J61BT11N
Page 2: ......
Page 34: ...1 10 1 10 MELSEC 1 OVERVIEW MEMO ...
Page 54: ...3 12 3 12 MELSEC 3 SPECIFICATIONS MEMO ...
Page 124: ...5 16 5 16 MELSEC 5 PROCEDURE BEFORE STARTING THE DATA LINK MEMO ...
Page 160: ...9 2 9 2 MELSEC 9 MELSEC DATA LINK LIBRARY MEMO 9 ...
Page 200: ...12 16 12 16 MELSEC 12 COMMUNICATION BETWEEN THE MASTER STATION AND LOCAL STATIONS MEMO ...
Page 355: ...App 93 App 93 MELSEC APPENDIX MEMO ...
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