Omron SYSMAC CJ1W-SCU21-V1, Operation Manual

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Specifications Section 1-6
Note 1. The baud rate and the communications distance sometimes depend on the
remote device.
2. A macro syntax error will occur if the interrupt notification method is exe-
cuted for a Serial Communications Unit.
3. When using 2-wire RS-422A/485 communications in Protocol Macro
Mode, set only modem controls for the send control parameters, and do
not use RS/CS flow controls.
Step contents Commands Send only (SEND), receive only (RECV), send and receive
(SEND&RECV), wait (WAIT), reception buffer clear (FLUSH), ER-ON
(OPEN), or ER-OFF (CLOSE)
Repeat counter 1 to 255 times
Retry count 0 to 9
(Only when the command is SEND&RECV)
Send wait time 0.01 to 0.99 s, 0.1 to 9.9 s, 1 to 99 s, or 1 to 99 minutes
(Only when the command is SEND or SEND&RECV)
With or without
response write
(operand) When receive processing is completed (when the receive data is stored
in the area specified in the 4th operand of the PMCR(260) instruction),
whether or not to store the received messages can be selected.
Next processing When a step has ended normally, End (sequence completed), Next (pro-
ceed to the next step No.), Goto (go to the specified step No.), or Abort
(interrupt the step and terminate that sequence) can be selected.
Error processing When a step has ended abnormally, End, Next, Goto, or Abort can be
selected.
Send message Data sent to the
specified address
when the command
is SEND or
SEND&RECV. Consists of a header (*1), address (*2), length,
data (*2), error check code (*3), and terminator
(*1).
For an explanation of *1, *2, and *3, see the next
page.
Receive message Data sent from the
specified address
when the command
is RECV or
SEND&RECV.
Reception matrix When the command
is RECV or
SEND&RECV, sets
the expected
receive messages
(15 max.), and
switches to the next
processing accord-
ing to the message
received. Specifies the receive messages and the next pro-
cessing for each of cases No. 00 to No. 15. Of the
maximum 16 cases, one case must be set as
“Other” in the receive messages (in addition to the
set receive messages).
Item Description