Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 144 / 478

4 Using Protocol Macros
4-8
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
A) Structure of Variable Area Read (MRC/SRC: 0101)* send message
B) Structure of Variable Area Read (MRC/SRC: 0101)* receive message
* MRC/SRC (0101) represents the Variable Area Read service available via CompoWay/F communication.
z
Detailed Example of CompoWay/F Message
CompoWay/F communication protocol for digital temperature controller E5 @ N
Send message
Receive message
For message details, refer to the E5CN/E5AN/E5EN/E5GN Digital Temperature Controllers Commu-
nications Manual (Basic Type) (Cat. No. H158).
MRC SRC Variable type Read start address Bit number Number of elements
0 1 0 1 0 0
2 2 2 4 2 4
MRC SRC Response code Read data (for number of elements)
0 1 0 1
2 2 4 Number of elements
×
8 or 4
BCC
1
Text
Node No. Subaddress SID Command text
STX 0 0 0 ETX
1 2 2 1 1
BCC calculation range
STX
Text
Node No. Subaddress End code Command text BCC
0 0 ETX
1 2 2 2 1 1
BCC calculation range