Danfoss VLT HVAC Drive FC-102P37KT4 [8/10] Notice
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Danfoss VLT HVAC Drive FC-102P37KT4 [8/10] Notice

Danfoss VLT HVAC Drive FC-102P2K2T4 [8/10] Notice
31-22 Above level threshold
Range: Function:
#
*
[ -2500 - 2500 Pa] Enter the above-level threshold.
31-23 On Delay Time
Range: Function:
60 s
*
[0 - 3600 s] Enter the on delay time.
31-24 Reset Delay Time
Range: Function:
9999 s
*
[0 - 9999 s] Enter the reset delay time.
31-25 Pressure lter time constant
Range: Function:
1 s
*
[0.01 - 60 s] Enter the pressure lter time constant. A
longer value make the pressure signal more
stable but less dynamic. A shorter value
allows to eliminate signal spikes and keep
control more dynamic.
31-2* Readouts
Parameters in this group contain the actual pressure levels and
the status information. The LCP can be congured to show the
values of these parameters in
dierent
display lines. The
toggle function allows to show multiple pressure signals in the
same LCP line. The number is followed by the hash sign (#).
See Illustration 1.9.
Use parameter 0-20 Display Line 1.1 Small to
parameter 0-24 Display Line 3 Large to congure the LCP to
show
dierent
pressure values.
Illustration 1.9 Pressure Sensor Data on the LCP
31-26 Pressure Sensor 1
Range: Function:
0 Pa
*
[-500 - 500 Pa] Shows the readout of pressure sensor 1.
31-27 Pressure Sensor 2
Range: Function:
0 Pa
*
[-500 - 500 Pa] Shows the readout of pressure sensor 2.
31-28 Pressure Sensor 3
Range: Function:
0 Pa
*
[-1000 - 1000 Pa] Shows the readout of pressure sensor
3.
31-29 Pressure Sensor 4
Range: Function:
0 Pa
*
[-2500 - 2500 Pa] Shows the readout of pressure sensor
4.
31-30 Press Sens Cmp State
Range: Function:
0
*
[0 -
255]
Shows the pressure sensor state. The state is an 8-
digit binary value, where 1 indicates an active status
and 0 indicates an inactive status. Reading from
right to left, the rst 4 digits indicate the alarms for
the below-level threshold, and the last 4 digits the
alarms for the above-level threshold. For instance,
counting from right to left, sensor 1 for the below-
level threshold is at position 1, and sensor 1 for the
above-level threshold is at position 5. See
Illustration 1.9.
NOTICE
When using this parameter in the smart logic
controller, the output status signal for the
below-level threshold and for the above-level
threshold is the same for a specic sensor.
For example, in the following cases the
output status signal is the same:
•
The below-level threshold for sensor
1 is active.
•
The above-level threshold for sensor
1 is active.
31-31 Press Sens toggle
Range: Function:
[0 - 4] Shows the pressure values on all sensors. The
readout switches between sensors in a loop, going
from sensor 1 to sensor 4. The sensor number is
followed by a hash sign, see Illustration 1.9.
Installation Instructions
Pressure Transmitter Unit PTU 025
VLT
®
HVAC Drive FC 102
8
Danfoss A/S © 12/2017 All rights reserved. MI08A102

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