Danfoss VLT HVAC Series, Programming Manual, Page: 116 / 338

8-03 Control Timeout Time
Range: Function:
60.0 s* [1.0 - 18000.0 s] Enter the maximum time expected to pass between the reception of two consecutive messages. If
this time is exceeded, it indicates that the serial communication has stopped. The function selected
in par.8-04
Control Timeout Function Control Timeout Function
will then be carried out.
In LonWorks, the following variables will trigger the Control Word Time parameter:
nviStartStop
nviReset Fault
nviControlWord
nviDrvSpeedStpt
nviRefPcnt
nviRefHz
8-04 Control Timeout Function
Option: Function:
Select the timeout function. The timeout function is activated when the control word fails to be
updated within the time period specified in par.8-03
Control Timeout Time
. Choice [20] only appears
after setting the N2 protocol.
[0] * Off
[1] Freeze output
[2] Stop
[3] Jogging
[4] Max. speed
[5] Stop and trip
[7] Select setup 1
[8] Select setup 2
[9] Select setup 3
[10] Select setup 4
[20] N2 Override Release
In LonWorks, the timeout function is also activated when the following SNVTs fail to be updated within the time period specified in par.8-03
Control
Timeout Time
:
nviStartStop
nviReset Fault
nviControlWord
nviDrvSpeedStpt
nviRefPcnt
nviRefHz
8-05 End-of-Timeout Function
Option: Function:
Select the action after receiving a valid control word following a timeout. This parameter is active
only when par.8-04
Control Timeout Function is set to [Set-up 1-4].
[0] Hold set-up Retains the set-up selected in par.8-04
Control Timeout Function
and displays a warning, until par.
8-06
Reset Control Timeout
toggles. Then the adjustable frequency drive resumes its original set-
up.
[1] * Resume set-up Resumes the set-up active prior to the timeout.
3 Parameter Description VLT ® HVAC Drive Programming Guide
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