![background image](http://html.mh-extra.com/html/omron/v400-r2-series/v400-r2-series_connection-manual_741434048.webp)
9. Program
45
●
Send/Receive messages
[Overview of send/receive messages]
Send message
Controller
Receive message
Destination
device
*
*
*
*
*
*
*
*
Terminator
Data
*
*
*
*
*
*
*
*
Data
Terminator
[Relationship between the SrcDat[ ]
send data array and the send message]
Communications Unit
→
Destination Device
Send message
CPU
→
Communications Unit
Send data array: ScrDat[ ]
*
*
* *
*
*
* *
0
15 0
15
0
15
0
15
Bit
*
*
*
*
* *
*
*
No. of send
data words
*
*
*
*
*
*
*
*
Terminator
Data
ScrDat[0]
ScrDat[1]
ScrDat[2]
ScrDat[n-1]
[Relationship between the
DstDat[ ] receive data array and the receive message]
Destination device
→
Communications Unit
Receive message
Communications Unit
→
CPU
Receive data array: DstDat[ ]
*
*
* *
*
*
* *
0
15 0
15
0
15
0
15
Bit
*
*
*
*
* *
*
*
No. of receive
data words
*
*
*
*
*
*
*
*
Terminator
Data
DstDat[0]
DstDat[1]
DstDat[2]
DstDat[n-1]