Omron CS1G/H-CPUxxH Instructions Manual page 881

Serial Communications Instructions
Flags
Precautions
860
No Start or End Code
1 2 3 4 5 6 0...
Only Start Code
1 2 3 4 5 6 0...
Only End Code
1 2 3 4 5 6 0...
Start and End Code
1 2 3 4 5 6 0...
CR+LF End Code
1 2 3 4 5 6 0... CR
Start and CR+LF End Code
1 2 3 4 5 6 0...
Received
CPU Unit's CS-232C port
Bytes
1
2
3
4
Max: 256 bytes
5
6
Name Label
Error Flag ER
RXD(235) can be used only for the CPU Unit's CS-232C port and only when
the port is set to no-protocol mode.
The following can be set in the PLC Setup for the frame format for receiving
messages.
Receive bytes: Specified
in the PC Setup
Receive bytes after ST:
Specified in the PC Setup
Receive bytes before
ED: 256 max.
Receive bytes between
ST and ED: 256 max.
LF
Receive bytes before
CR+LF: 256 max.
Receive bytes between
ST and CR+LF: 256 max.
When receiving the most signifi-
cant bytes first is specified (0):
Most signifi-
cant bytes
N bytes
stored in the
specified or-
der.
When receiving the least signifi-
cant bytes first is specified (0):
Most signifi-
cant bytes
Operation
ON if the no-protocol mode is not set in the PLC Setup.
ON if the value of C is not within range.
ON if the value for N is not between 0000 and 0100 hex.
With the CS1D CPU Units: ON if the active and standby
CPU Units could not be synchronized.
OFF in all other cases.
Section 3-24
Least signif-
icant bytes
1 2
3 4
5 6
Least signif-
icant bytes
1 2
3 4
5 6