Omron SYSDRIVE 3G3RV, User Manual, Page: 314 / 446

6
-98
n
Configuration of the Protocol Macro Function
The
protocol consists of one or more sequences. A sequence is an independent set of actions to perform
together
with a general-purpose peripheral device, such as an Inverter. For example, the RUN command and
the
frequency reference are given to the Inverter and the status of the Inverter is read in a single sequence.
A
sequence consists of one or more steps. A step consists of a Send & Recv c a Send & Recv mes-
sage
+ a step branch in accordance with the processing Completion.
Sequence
When
repeating actions to give the RUN command and frequency reference to the Inverter and read the status
of
the Inverter, for example, the actions can be registered as one sequence, or more than one if necessary. On
page
101 under Creating a Project File, an example is shown with all actions registered as a single sequence.
A
sequence may include the following parameters.
Fig 6.64
Parameter Description
Transmission
control
Set
the method of control, such as flow control.
Select
only modem control for communications with the 3G3RV.
Link
word
Set
the area for sharing the data between the Programmable Controller and Communications
Board.
On
page 101 under Creating a Project File, an example is shown without such an area set.
Monitor
time
Set
the periods to monitor the transmission and reception steps with timers Tr, Tfr, and Tfs.
Set
a period of approximately 0.5 s each for communictions with the 3G3RV.
Response
notify method
A
method to write reception data to the I/O memory of the Programmable Controller.
Select
“notify by scan” for communictions with the 3G3RV.
PMCR instruction
SYSDRIVE 3G3RV CPU Unit
DSR message
(Write the RUN command
and frequency response.)
Response
Step 00
DSR message
(Read the inverter status)
Response
(Inverter status)
Step 01
Sequence 000
Serial Communications Board