3.19 Parameters 22-** Application Functions
3.19.1 22-0* Miscellaneous
This group contains parameters used for monitoring water/
wastewater applications.
22-00 External Interlock Delay
Range:
Function:
0 s
*
[0 - 600
s]
Only relevant if 1 of the digital inputs in
parameter group 5-1* Digital Inputs
has been
programmed for
[7] External Interlock
. The
22-00 External Interlock Delay
Range:
Function:
external interlock timer introduces a delay after
the signal has been removed from the digital
input programmed for external interlock, before
reaction takes place.
22-01 Power Filter Time
Range:
Function:
0.50 s
*
[0.02 - 10 s]
3.19.2 22-2* No-Flow Detection
Illustration 3.63 Signal Flow Chart
The VLT
®
AQUA Drive FC 202 includes functions that
detect if the load conditions in the system allow the motor
to be stopped:
•
Low-power detection.
•
Low-speed detection.
1 of these 2 signals must be active for a set time
(
) before selected action
takes place. Possible actions to select (
) are:
•
No action.
•
Warning.
•
Alarm.
•
Sleep mode.
No-flow detection
This function is used to detect a no-flow situation in pump
systems where all valves can be closed. It can be used
both when controlled by the integrated PI controller in the
frequency converter or an external PI controller. Program
the actual configuration in
.
Configuration mode for:
•
Integrated PI controller: Closed loop.
•
External PI controller: Open loop.
Parameter Description
Programming Guide
MG20OB02
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Summary of Contents for VLT AQUA Drive FC 202
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