Cascade Controller Option
Extended Menu Par. 004 LCP Copy
(LCP COPY)
Value:
✭
No copying (NO COPY)
[0]
Upload all parameters
(UPLOAD ALL PARAMET.)
[1]
Download all parameters
(DOWNLOAD ALL PARAM.)
[2]
Download power-independent parameters
(DOWNLOAD SIZE INDEP.)
[3]
Function:
This parameter is used to copy all parameter setups to
or from the Local Control Panel (LCP) keypad. It can
be used to store a backup copy of all parameters in the
LCP or to copy all setups from one drive to another.
Description of choice:
Select
Upload all parameters
to copy all parameter
values from the drive to the LCP.
Select
Download all parameters
to copy all
parameter values from the LCP to the drive on
which the keypad is mounted.
Select
Download power-independent parameters
if only the power-independent parameters are
to be downloaded. This allows the parameters
from one drive to be easily copied to another
drive of a different size. Settings in parameters
102, 103, 104, 105, 106, 215, 221, and 222 are
not downloaded using this function.
NB!:
Copying is only possible when drive is stopped.
■
Alternate programming:
Pump/system data for MUSEC unavailable:
In cases where the pump or system data points are
not known, the best efficiency staging and destaging
frequencies are difficult to calculate. Operation
of the system is possible with an approximation
of the best efficiency function.
1. Set staging on frequency in Quick Menu item
33 (parameter 739,
Master/Slave staging
on frequency
), to the maximum frequency
set in Quick Menu item 08 (parameter 202,
Output frequency high limit
).
2. For an approximation of best efficiency, set
the destaging frequences in Quick Menu item
34 (parameter 740,
Master/Slave staging
off frequency
), to half of the frequency set
between Quick Menu item 08 (parameter 202)
and Quick Menu item 07 (parameter 201,
Output frequency low limit
).
Alternate Feedback Programming :
In water supply systems, it is often impractical to
place a pressure sensor at the far end of the system.
In HVAC and other applications, however, it is often
possible to place the pressure sensor(s) at the farthest
significant load and measure actual pressure in the
system. In these cases, the cascade option can
use the drive
’
s PID controller to respond to system
changes as programmed. Pumps or fans are staged
on and off in response to the system feedback signal.
The most common setup for feedback response
is with a single transmitter located at the farthest
significant load in the system. Programming the
cascade controller option in this manner is described
below. It is also possible for the PID to accept
two feedback signals, making two-zone regulation
available. For two feedback control, and for additional
setting options, see the
VLT Operating Instructions
.
Setup for feedback response is with a single
transmitter located at the farthest significant load in
the system requires programming parameter 417,
Feedback Function
, and parameter 418,
Setpoint 1
.
Parameter 417,
Feedback Function
, is only accessible
through the Extended Menu. The Extended Menu
is accessed by pressing the [EXTEND. MENU] key
on the drive control panel. Parameter 418 may
be accessed through either the Extended Menu
or as item 28 in the Quick Menu.
Extended Menu Par. 417 Feedback Function
(2 FEEDBACK, CALC.)
Value:
Minimum (MINIMUM)
Maximum (MAXIMUM)
Sum (SUM)
Difference (DIFFERENCE)
Average (AVERAGE)
Two-zone minimum (2 ZONE MIN)
Two-zone maximum (2 ZONE MAX)
✭
Virtual Control Curve (VIRTUAL CTRL CURVE)
Feedback 1 Only (FEEDBACK 1 ONLY)
Feedback 2 Only (FEEDBACK 2 ONLY)
Function:
This parameter sets the calculation method whenever
a system feedback signal is used, or when two
feedback signals (Setpoint 1 and Setpoint 2) are used.
Description of choice:
Select the feedback calculation method required.
Maximum uses Setpoint 1 as the maximum
MG.60.I3.02 - VLT is a registered Danfoss trademark
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