Vacon nx User Manual page 106

106 • vacon
HMI acknowledge timeout (P6.7.3)
This function allows the user to change the timeout of the HMI acknowledgement time in cases where
there is an additional delay in the RS-232 transmission due to use of modems for communication over
longer distances, for example.
Note! If the frequency converter has been connected to the PC with a normal cable, the default values of
parametres 6.7.3 and 6.7.4 (200 and 5) must not be changed.
If the frequency converter has been connected to the PC via a modem and there is delay in transferring
messages, the value of par. 6.7.3 must be set according to the delay as follows:
Example:
•
•
•
It must also be considered that intervals shorter than the AckTimeOut-time cannot be used in NC-Drive
monitoring.
Enter the edit mode by pushing the
acknowledgement time. Accept the change with the
Menu button left
.
I/Oterm
HMI ACK timeout
200ms
Figure 7-23. HMI acknowledge timeout
Number of retries to receive HMI acknowledgement (P6.7.4)
With this parameter you can set the number of times the drive will try receive acknowledgement if this
does not succeed within the acknowledgement time (P6.7.3) or if the received acknowledgement is faulty.
Enter the edit mode by pushing the
Browser buttons
to change the amount of retries. Accept the change with the
previous level with the
See Figure 7-23 for the procedure of changing the value.
Sine filter (P6.7.5)
When using an older motor or a motor not designed to be used with a frequency converter, it may be
necessary to use a sine filter. A sine filter enhances the sine form of the voltage even more than a du/dt
filter.
Provided that you have a sine filter in your drive you can put it into operation with this parameter set to
Connected
value .
7
Transfer delay between the frequency converter and the PC = 600 ms
The value of par. 6.7.3 is set to 1200 ms (2 x 600, sending delay + receiving delay)
The corresponding setting shall be entered in the [Misc]-part of the file NCDrive.ini:
Retries = 5
AckTimeOut = 1200
TimeOut = 6000
Menu button right
READY
HMI ACK timeout
Menu button right
Menu button left
.
Browser buttons
. Use the
Enter button
or return to the previous level with the
READY
I/Oterm
200ms
. The present value shown starts to blink. Use the
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CONTROL KEYPAD
to change the
enter
Enter button
or return to the