Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 181

Overview of the Protocol Macro Functions
Board
(CS Series only) (CS/CJ Series)
Port 1 Port 2 Port 1
D32001 D32011 m + 1
D32008 D32018 m + 8
D32009 D32019 m + 9
Handling
Communications
Problems for Standard
System Protocols
152
Unit Contents
Port 2
m + 11 Bits 00 to 03: Baud rate
m + 18 Bit 15: Transmission method
m + 19 Bits 00 to 15: Max. No. of send/
receive bytes
The CS/CJ-series PLCs provide standard system protocols to enable commu-
nications with OMRON components without having to create communications
sequences. The sequences in the standard system protocols can be executed
merely by setting operands for the PMCR(260) instruction.
Processing for communications line problems during communications for the
standard system protocols are set to normal settings, as shown in the follow-
ing table. If these settings are not suitable to the application or if improve-
ments are desired, use the CX-Protocol to modify the following settings in the
required sequences. For details on the use of the CX-Protocol, refer to the
CX-Protocol Operation Manual (W344). Refer to the appendices for the set-
tings in the standard system protocols.
Level
Sequence Link words
parameters
Transmission control
parameters
Response notifica-
tion method
Reception wait time Tr The monitoring times are set to 3 seconds
Reception finished
wait time Tfr
Send finished wait
time Tfs
Step parame- Repeat counter
ters
Command
Retry count
Send wait time
Send message
Receive message
Response write
enable
Next process
Error process
Setting for a standard system protocol
Set to match the baud rate of the external
device.
Set to 0 Hex to specify half-duplex.
Set to 03E8 Hex to specify 1,000 bytes.
Item Possible changes in settings
No reason to change.
for most sequences. The settings are differ-
ent for send-only and receive-only
sequences, as well as for sequences that
require time for responses.
No reason to change.
The retry count is general set to 3 retries (4
tries total) for sequences that use the
SEND&RECV command. Different settings
are used for sequences that have other
commands.
No reason to change.
Section 5-1