Omron Sysmac CJ Series - Page 55

9. Program
52
 e
[O
Send/receive messag
verview of send/receive message]
S
PLC
Receive message
end message
Destination
device
CR LF * * * ***
Te r mi n a to r
Data
CR LF
* * * **
*
Data
Terminator
[Relationship between send area S (PMCR instruction operand) and send message]
Communications Unit → Destination device
Send message
CPU→Communications Unit
Send area:S
+1 word
+2 words
+(n-1) word
+0 word
****** **
015 015 0 15 015
Bit
* * * * * ***
No. of send
area words
CR LF* * * ** *
Ter mi na to r
Data
[Re a R (PMCR instruction operand)] lationship between receive message and receive are
Destination device →Communications Unit
Receive message
Communications Unit → CPU
Receive area: R
+0 word
+1 word
+2 words +(n-1) ordsw
****** **
015 015 0 15 015
Bit
* * * * ****
No. of receive
area words
* * * ** * CR LF
Terminator
Data