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Parameter Setting Baud rate
Baud rate
00 1,200 bps
01 2,400 bps
02 4,800 bps
03 9,600 bps
04 19,200 bps
8-6-3 Communications Procedure
The Protocol Macro’s communications sequences must be created with the Pro-
tocol Support Software and transferred to the Communications Board in ad-
vance. In the PC, the PMCR(––) instruction is executed to execute a commu-
nications sequence stored in the Communications Board.
Up to 1,000 communications sequences with sequence numbers 000 to 999 can
be created with the Protocol Support Software. Each communications se-
quence is composed of a maximum of 16 steps. The following table shows the
communications sequence settings.
Item Function Parameter settings
Sequence
settings
Transmission control Sets the transmission control method,
such as X-on/X-off flow control or RS/
CS flow control.
X-on/X-off, RS/CS, modem control, de-
limiter control, or contention control
Link words Sets the link words for the data link be-
tween the PC and Communications
Board.
IR/SR, LR, HR, AR, DM, and EM areas
Monitor time Sets the monitor time (watchdog timer)
for communications processing.
Reception standby, reception com-
pleted, transmission completed
0.01 s, 0.1 s, 1 s, and 1 minute units
Response notification Sets the timing for writing the received
data.
Scan notification or interrupt notification
Step
settings
Repeat counter Sets the number of times to repeat the
step.
Constant 0 to 255
IR/SR, LR, HR, AR, DM, and EM areas
Command Sets the communications command. Send, Recv, or Send&Recv
Number of retries Sets the number of retries when errors
occur for the Send&Recv command.
0 to 9
Transmission wait time Sets the time to wait before sending
the data when transmitting
0.01 s, 0.1 s, 1 s, and 1 minute units
Transmission message Sets the transmission data for the Send
or Send&Recv commands.
Header, address, length, data, error
check code, and terminator
Reception message Sets the expected reception data for
the Recv or Send&Recv commands.
Header, address, length, data, error
check code, and terminator
Reception matrix Sets the expected reception data (up to
15 types) for the Recv or Send&Recv
commands and adjusts processing de-
pending on the data type.
Header, address, length, data, error
check code, terminator, and next pro-
cess
Response notification Sets whether or not to write the re-
ceived data.
Yes/No
Next process Sets the next step to go to when the
current step has been completed suc-
cessfully.
End, Goto, Next, or Abort
Error processing Sets the next step to go to when an er-
ror has occurred in the current step.
End, Goto, Next, or Abort
Communications Sequence
Structure
The Protocol Macro Function
Section 8-6