Instruction manual

Cascade Controller Option
■ Step 2: Slave Drive Programming
The slave drives run in open loop mode and recieve
stop/start and speed reference commands from the
Master drive. Each slave drive must be programmed
with the nameplate data from the motor it controls.
All other applicable parameter settings must match
the settings in the Master drive.
All parameter settings can be transferred from one
AFD drive to another by using the removeable keypad.
Parameter 004, LCP Copy, allows this function. First,
upload all parameter values to the Local Control Panel
(LCP) keypad. The keypad can then be removed
and plugged into another AFD where all parameter
values can be downloaded. If motor or drive sizes
differ, Dow nload Power-independent Parameters can
be selected in parameter 004 to omit downloading
motor and current dependent data.
Manual programming of slave drives is also possible
following the procedure described for Master drive
programming. To copy required Master drive
parameter settings manually into each slave drive,
enter Master drive settings for Quick Menu items
7-13 and 18-19 into each slave drive.
Commisioning slave drives is done in the
following sequence of events:
E
nter Motor Nameplate Data
Enter the nameplate data from each motor into
its associated drive in accordance with Quick
Menu items 001 - 006 in Chapter 6, AFD and
Cascade Control Card Setup.
D
ownload master drive programming data
Use the Master LCP to download parameter setting
into the slave drives in accordance with procedures
in Extended Menu parameter 004, LCP Copy.
The Extended Menu is accessed by pressing the
[EXTEND. MENU] key on the LCP keypad.
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 Downlo ad 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.
NOTE
Copying is only possible when drive is stopped.
■ Alternate p rogramming:
P
ump/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 34
(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 35
(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).
A
lternate 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
MG.60.I5.22 - VLT is a registered Danfoss trademark
55
Master/Slave Cascade
Control Setup