Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 376 / 478

A Standard System Protocol
R-42
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Note In the following diagrams "hex" indicates hexadecimal values. Values in quotation marks, such
as "00" indicate ASCII characters.
Command Frame
Response Frame
• Normal Response Type 1
• Normal Response Type 2
• Error Response
R-3-2 Command/Response Formats
ENQ
05 hex
2 bytes
Checksum
PLC
No.
Characters (text)
@@
hex
@@
hex
@@
hex
@@
hex
1 byte 2 bytes 2 bytes 2 bytes 1 byte
30 hex
Station
No.
Command
code
Transmission
delay
STX
PLC
No. Characters (text) ETX Checksum
1 byte 1 byte 1 byte 1 byte 1 byte
03 hex
1 byte 1 byte 1 byte
02 hex
@@
hex
@@
hex
@@
hex
@@
hex
Station
No.
ACK
PLC
No.
06 hex
1 byte 1 byte 1 byte 1 byte
@@ hex @@ hex @@ hex @@ hex
1 byte
Station
No.
2 bytes
02 hex
1 byte 1 byte 1 byte 1 byte
@@ hex @@ hex @@ hex @@ hex
1 byte
NAK
PLC
No.
Error code
Station
No.