5-5SectionUsing Protocol Macros
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Depending on the response received, the user can either choose to resend thesame send message (retry processing), or to perform the next process (for ex-ample, read the process value for a Temperature Controller with a different ad-dress).
One protocol
Sequence No. 000 to 999
(60 sequences max./protocol)
Transmission
control parameter
Link word setting
Send/receive
processing
monitoring time
Response
notification method 15 steps max.
One-step structure
With the SEND, RECEIVE, or
SEND&RECEIVE command
Command (see Note 1)
Next process
Next step
To specified step
Sequence end
Sequence interrupt
Error processing
Header Address Terminator
Step 0
Messages (see note 2)
Message list (see note 2)
Send message list
Data Check
Receive message list
Reception matrix list (see note 2)
Reception matrix
Case No. 15
Repeated
N (no)
N (error)
Normal end
Next process
Case No. 00
Receive message
Header Address TerminatorData Check
Step 1
15 steps max.
Step 0
Step 1
Y
N (no)
Y
Retry?
(See
note 3.)
Note 1. The SEND, RECEIVE, or SEND&RECEIVE commands can be used.2. Three types of reception matrix are available for switching the processing,depending on whether the messages are send messages, receive (wait)messages, or multiple receive (wait) messages. Unlike sequences, thesematrixes are managed as lists.3. Retries are possible on for the SEND&RECEIVE command.

Parameter Meaning

Transmission control

parameters Control methods, such as flow control

Link words Settings for shared words between the PC and the

Serial Communications Board.

Monitoring time Monitoring time for send/receive processing

Response notification method Timing for writing received data to I/O memory in

the PC

Sequence Parameters