Omron SYSMAC CJ1W-SCU21-V1, Руководство по эксплуатации

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Overview of the Protocol Macro Functions Section 5-1
Handling
Communications
Problems for Standard
System Protocols 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.
D32001 D32011 m + 1 m + 11 Bits 00 to 03: Baud rate Set to match the baud rate of the external
device.
D32008 D32018 m + 8 m + 18 Bit 15: Transmission method Set to 0 Hex to specify half-duplex.
D32009 D32019 m + 9 m + 19 Bits 00 to 15: Max. No. of send/
receive bytes Set to 03E8 Hex to specify 1,000 bytes.
Board
(CS Series only)
Unit
(CS/CJ Series)
Contents Setting for a standard system protocol
Port 1 Port 2 Port 1 Port 2
Level Item Possible changes in settings
Sequence
parameters Link words No reason to change.
Transmission control
parameters
Response notifica-
tion method
Reception wait time Tr The monitoring times are set to 3 seconds
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.
Reception finished
wait time Tfr
Send finished wait
time Tfs
Step parame-
ters Repeat counter No reason to change.
Command
Retry count 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.
Send wait time No reason to change.
Send message
Receive message
Response write
enable
Next process
Error process