Danfoss VLT HVAC Talimatlar - Sayfa 6
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VLT® HVAC Basic Drive Casca...
1
1
Parameter
25-58 Run
Next Pump
Delay
25-59 Run on
Mains Delay
25-80 Cascade
Status
25-81 Pump
Status
1.2 Installation
1.2.1 Control Terminals
Illustration 1.3 shows all control terminals of the frequency
converter. Applying Start (terminal 18), connection
between terminal 12-27 and an analog reference (terminal
53 or 54 and 55) make the frequency converter run.
4
VLT
Range
Default
Function
0.1-5.0 s
*0.1 s
Time between
stopping the old
variable speed
pump and
starting the new
appointed pump.
Expressionlimit
*0.5 s
Time delay
(0.1)-5.0 s
before a fixed
speed pump is
staged on
according to
normal staging
sequence.
View the control
status for the
Cascade
Controller.
0-0
* 0
View the status
for the pumps
connected:
X=Disabled,
O=Off, D=Speed
controlled,
R=Mains.
MI18I302 - VLT
®
HVAC Basic Drive Cascade Controller
Parameter
25-84 Pump
ON Time
25-90 Pump
Interlock
Table 1.3
BUS TER.
OFF
ON
61 68 69
0/4-20mA A OUT / DIG OUT
Illustration 1.3 Control Terminals
®
is a registered Danfoss trademark
Range
Default
Function
0-2147483647
* 0
View the total
operating hours
of the connected
pumps. Can be
reset by writing
0..
*[0] Off
*[0] Off
Choose the
[1] On
pump to
interlock for e.g.
service. The
pump will be
taken out of any
pump cycling etc.
18 19
27 29 42 45 50 53 54
0/4-20mA A OUT / DIG OUT
12 20 55
COM A IN
COM DIG IN