Filter
Top Products
5-5SectionUsing Protocol Macros
77
Depending on the response received, the user can either choose to resend the
same 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
S Next step
S To specified step
S Sequence end
S 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, these
matrixes 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