Omron SYSDRIVE 3G3MV User Manual page 240

Communications
Timer Tr
Timer Tfr
Timer Tfs
Set the periods to monitor the transmission and reception steps with timers Tr, Tfr, and
Tfs. The following timing chart shows the meaning of each monitor.
Be sure to set the periods according to the application.
The step will be retried if the step is not completed within the monitor periods. An error
will occur if the step is not completed within the monitor time again.
Note Set a period of approximately 0.5 s each for communications with the 3G3MV.
Send & Recv
Ts: Send wait time set per step. Nothing is sent during this period.
Tfs: Monitors the completion of the data sent. If the data transmission is not finished
within this period, the data will be re-transmitted.
Tr: Monitors the response to be received. If the response is not returned within this
period, the response will be re-transmitted.
Tfr: Monitors the reception completion of the response. If the response transmission
is not finished within this period, the response will be re-transmitted.
NoteIf the Tr period is too long, the time required to detect a communications error
will be longer, during which the Inverter cannot be controlled. Therefore, be sure
to set an appropriate period.
H Creating a Step
1. Double-click on Protocol with the left button of the mouse.
2. Click on Sequence with the left button of the mouse and click on a blank space with
the right button of the mouse.
3. Select New Step.
The following table will appear. Set the parameters related to the step in the table.
* Step Repeat
counter
j 00 Reset/R Send &
(1) Recv
j 01 Reset/R Send &
(1) Recv
j
7-46
Monitored for Tfs
period.
Com- No. of Send
mand retries wait
time
3 ---
3 ---
Monitored for Tr period.
Monitored for Tfr
period.
Send Recv
mes- message
sage
Input Input Yes
send response
Status Read Yes
response
Chapter 7
Res- Next Error
ponse process process
write
Next Abort
End Abort