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10.3 De-Ice Function
This is a cooling tower function to run at low speed in the opposite (reverse) direction than standard. This function is for
prevention of ice build up in colder climates.
Set De-Ice Speed (75.02) to a value under 30% base motor speed.
Set the De-Ice Run Time (75.03) to the time desired for operation in this function.
Select a De-Ice Enabling Mechanism and se 75.01 accordingly.
When De-Ice is enabled with XDIO2 terminal Closed, the drive will enter De-Ice mode for the Run Time set in 75.03. If the
drive has a valid Run Command applied at the same time as a De-Ice Command, the drive will run in De-Ice Mode (Reverse)
for the specified time and then enter Run.
NOTE: De-Ice in Keypad Operation
The Keypad operates the CTDD drive in local control. To initiate De-Ice while using the Keypad, the drive must first
be placed in remote control.
10.3.1 De-Ice Parameter Settings
De-Ice Enable (75.01)
De-Ice Speed (75.02)
De-Ice Run Time (75.03)
10.3.2 CTDD Assistant Access
In addition to programming changes in group 75, De-Ice function setup is an option under the CTDD startup assistant:
3AXD50000011888
Default: 0 (Disable)
Range: 0 - 3
0 (Disable) Disable De-Ice mode
1 (DIO2) Enable De-Ice mode using DI02
2 (FBA) Enable De-Ice mode using Embedded Fieldbus
3 (EFB) Enable De-Ice mode using Embedded Fieldbus
Disable (0) disables the De-Ice function. If set to DIO2 (1), the Digital Input DIO2
will be used to enable the De-Ice function. If set to FBA (2), the De-Ice function is
commanded via the Control Word of the Fieldbus Adapter Module. If set to EFB
(3), the De-Ice function is commanded via the Copntrol Word of the Embedded
Fieldbus.
Default: 30%
Range: 0 to 100%
De-Ice speed can be reprogrammed from 0% to 100% speed.
Default: 1 Min.
Range: 0 to 1500 Minutes
Value of time to run in De-Ice function when Software Enable is active, and a
hardware input is present. Drive will run at De-Ice function speed for the set run
time and then shut down.
Figure 10-2 De-Ice Function
Local
De-Ice
Set parameters for De-ice.
Enable
De-Ice Speed
Run Time
Minimum torque 1
Back
CTDD
50.0 rpm
Disabled
30%
1 min
-30.0 %
00:00
Next
Additional Setup 10-3
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