Omron CJ1W-SCU32 Operation Manual page 141

Depending on the response received, this function can either choose to resend the same send mes-
sage (retry processing), or to perform the next process (for example, read the process value for a Tem-
perature Controller with a different address).
One protocol
Sequence No. 000 to 999
(60 sequences max./protocol)
Transmission Step 0
control parameter
Step 1
Link word setting
Send/receive
processing
monitoring time
Response
notification method
15 steps max.
Message list (*2)
Send message list
Header Address Data Check
Receive message list
Header Address Data Check
Reception matrix list (*2)
Reception matrix
Case No. 15
Case No. 00
Receive message
*1 You can use the Send, Recv, Send&Recv, Wait, Flush (reception buffer clear), Open (ER-ON), or Close (ER-
OFF) command.
*2 Three types of reception matrix are available to switch the processing, depending on whether the messages
are send messages, receive (wait) messages, or multiple receive (wait) messages. Unlike sequences, these
matrixes are managed as lists.
Sequence Parameters
Parameter
Transmission control parame-
ters
Link words
Monitoring time
Response notification method
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Step 0
Step 1
15 steps max.
Terminator
Terminator
Next process
Control methods, such as flow control
Settings for words shared between the PLC and the
Serial Communications Unit
Monitoring time for send/receive processing
Timing for writing received data to memory used for
CJ-series Units in the PLC
4 Using Protocol Macros
One-step structure
With the Send, Recv,
Send&Recv command
Command (*1)
Messages (*2)
Y
Repeated
N (no)
N (error)
Normal end
Next process
Error processing
• Next step
• To specified step
• Sequence end
• Sequence interrupt
Meaning
With the Wait, Flush, Open,
or Close command
Command
(*1)
Next process
4-5
4