Omron SYSDRIVE 3G3MV - Page 235

7-41
·InthecaseofrepetitiveactionstoissuetheRUNcommandandfrequencyreferenceto
theInverterandreadthestatusoftheInverter,forexample,theactionstogivetheRUN
commandandfrequencyreferenceisonestep.Thereasonis thattheseregisternum-
bers are consecutive and canbe sentwith asingle DSRmessage. Theaction toread
the status of the Inverter is another step.
·A step includes a command and a maximum of two messages.
The above example uses the Send & Recv command. The DSR message and
response are both messages.
·A step may include the following parameters.
Parameter Description
Command The Send, Send & Recv, Wait, Flush, Open (ER-ON),
or Close (ER-OFF) command is set.
Note In 7-9-4 Creating a Project File, an example is
shown with the Send & Recv command used.
TheSendcommandisusedforabroadcastmes-
sage.
Message
Send message A DSR message is set for the Send command used.
M
e
s
s
a
g
e
Recv message A response is set for the Recv command.
Send & Recv
message
A DSR message and response are set for the Send &
Recv command.
Recv matrix If there are two or more responses for the Send or
Send & Recv command, the next process is selected
per response.
Repeat counter The number (N) of times to repeat the step is set
within a range from 0 to 255.
It is possible to change messages by making use of
the number (N).
Note In 7-9-4 Creating a Project File, an example is
shown with this function used for enabling three
Slaves to repeat the same process.
No. of retries The number of times to retry the command can be set
within a range from 0 to 9 only when the Send & Recv
command is used.
Note It is recommended thatthe numberbe setto 3or
larger.
Send Wait Time The waiting time until data is sent with the Send or
Send & Recv command executed.
Response Write (with operand
specified)
Determines whether or not to write the reception data
in the response.
Note In 7-9-4 Creating a Project File, an example is
shown with this function used for writing the
Inverter status to the memory.
Communications Chapter 7