Danfoss VLT AutomationDrive FC 301 Programming Guide

Preset ref. bit
2
1
0
Preset ref. 3
0
1
1
Preset ref. 4
1
0
0
Preset ref. 5
1
0
1
Preset ref. 6
1
1
0
Preset ref. 7
1
1
1
Table 330: Digital Inputs, Function Descriptions - 2
Option
Function
[19]
Freeze
ref
Freezes the actual reference, which is now the point of enable/condition to be used for [21] Speed up and [22]
Speed down. If speed up/speed down is used, the speed change always follows ramp 2 (parameter 3-51 Ramp 2
Ramp Up Time and parameter 3-52 Ramp 2 Ramp Down Time) in the range 0–parameter 3-03 Maximum Refer-
ence.
[20]
Freeze
output
Freezes the actual motor frequency (Hz), which is now the point of enable/condition to be used for [21] Speed
up and [22] Speed down. If speed up/speed down is used, the speed change always follows ramp 2 (parameter
3-51 Ramp 2 Ramp Up Time and parameter 3-52 Ramp 2 Ramp Down Time) in the range 0–parameter 1-23 Motor
Frequency.
N O T I C E
When freeze output is active, the drive cannot be stopped via a low [8] Start signal. Stop the drive via a ter-
minal programmed for [2] Coasting inverse or [3] Coast and reset inverse.
[21]
Speed
up
Select [21] Speed up and [22] Speed down for digital control of the up/down speed (motor potentiometer). Acti-
vate this function by selecting either [19] Freeze ref or [20] Freeze output. When speed up/speed down is activa-
ted for less than 400 ms, the resulting reference is increased/decreased by 0.1%. If speed up/speed down is
activated for more than 400 ms, the resulting reference follows the setting in ramping up/down parameters 3-
x1/3-x2.
Table 331: Shut Down/Catch Up
Shut down
Catch up
Unchanged speed
0
0
Reduced by %-value
1
0
Increased by %-value
0
1
Reduced by %-value
1
1
Table 332: Digital Inputs, Function Descriptions - 3
Option
Function
[22]
Speed
down
Same as [21] Speed up.
[23]
Set-up se-
lect bit 0
Select [23] Set-up select bit 0 or select [24] Set-up select bit 1 to select 1 of the 4 set-ups. Set parameter 0-10
Active Set-up to [9] Multi Set-up.
[24]
Set-up se-
lect bit 1
(Default digital input 32): Same as [23] Set-up select bit 0.
AU275636650261en-000101 / 130R0334 | 181Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT AutomationDrive FC 301 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 301
Category	DC Drives
Language	English