Preset ref. bit
2
1
0
Preset ref. 5
1
0
1
Preset ref. 6
1
1
0
Preset ref. 7
1
1
1
Table 285: 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 286: 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 287: 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
.
[26] Precise
stop inv.
Sends an inverted stop signal when the precise stop function is activated in
parameter 1-83 Precise Stop Func-
tion
. Precise stop inverse function is available for terminals 18 or 19.
AU373327181955en-000101 / 130R1208
146 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
