Omron SYSDRIVE 3G3RV Series User Manual

C
ommunications Functions
6
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9
9
Step
In a single step, a DSR message is sent and a response for the DSR message is received. A step may not
include a response if it is a broadcast message.
In the case of repetitive actions to issue the RUN command and frequency reference to the Inverter and read
the status of the Inverter, for example, the actions to give the RUN command and frequency reference consti-
tute one step. The reason is that these register numbers are consecutive and can be sent with a single DSR
message. The action to read 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 com-
mand. The DSR message and response are both messages.
A step may include the following parameters.
Parameter Description
Command
The Send, Recv, Send & Recv, Wait, Flush, Open (ER-ON) or Close (ER-OFF) is set.
Under Creating a Project File
, an example is shown with the Send & Recv command
used. The Send command is used for a broadcast message.
Message
Send message A DSR message is set for the Send command used.
Recv message A response is set for the Recv command.
Send & Recv mes-
sage
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).
Under Creating a Project File
, an example is shown with this function used for
enabling three Slaves to repeat the same process.
Number 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.
It is recommended that the number be set to 3 or 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.
Under Creating a Project File, an example is shown with this function used for writ-
ing the Inverter status to the memory.
Next process
Determines which step is to be processed next, or finishes the opertion after the step is
finished normally.
Error processing
Determines which step is to be processed next, or finishes the operation, if the the step
has an error.

Omron SYSDRIVE 3G3RV Series Specifications

General

Brand	Omron
Model	SYSDRIVE 3G3RV Series
Category	Inverter
Language	English