Omron CJ1W-SCU32 Operation Manual page 143

Standard System Protocol Example
Example: Variable Area Read (Sequence No. 610) Sequence for CompoWay/F Master Protocol
Level
Sequence
Steps
Send message
SD MEM_R
Receive message
RV MEM_R
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Item
Link words
Transmission control
parameters
Response notification
method
Receive Wait Monitoring
Time Tr
Receive Finished Monitor-
ing Time Tfr
Send Finished Monitoring
Time Tfs
Step number
Repeat counter
Command
Retry count
Send wait time
Send message
Receive message
Response write enable
Next process
Error process
Header <h>
Terminator <t>
Error check code <c>
Length <l>
Address <a>
Message edited
* Refer to A) outside the
table for the message
structure after
MRC/SRC.
Header <h>
Terminator <t>
Error check code <c>
Length <l>
Address <a>
Message edited
* Refer to B) outside the
table for the message
structure after
MRC/SRC.
4 Using Protocol Macros
Setting
---
Modem control
Scan
3s
3s
3s
00
Reset/001
Send&Recv
3
---
SD MEM_R
RV MEM_R
Write
End
Abort
STX
ETX
LRC (horizontal parity) (0) (1 byte of BIN)
---
$ (R (1), 2)
<h> + <a> + "00" + "0" + "0101" + $ ~ (R (2), 2)
Node No. Subaddress SID MRC/SRC
+ $ (R (2), 2) + $ ~ (R (3), 4) + $ ~ (R (4), 4) + <t> + <c>
Read start address Bit number
STX
ETX
LRC (horizontal parity) (0) (1 byte of BIN)
---
$ (R (1), 2)
<h> + <a> + "00" + (*, 2) + "0101" + & (W (1), 4)
Node No. Subaddress End code MRC/SRC
+ & (W (2), *) + <t> + <c>
Read data (for number of elements)
Variable type
Number of elements
Response code
4-7
4