Danfoss VLT FC 100 Series Programming Manual page 70

Parameter Description
Preset ref. bit
Preset ref. 0
Preset ref. 1
Preset ref. 2
Preset ref. 3
Preset ref. 4
Preset ref. 5
Preset ref. 6
Preset ref. 7
Table 3.11
[19] Freeze ref Freezes actual reference. The frozen
reference is now the point of enable/
condition for Speed up and Slow to be
used. If Speed up/Slow is used, the speed
change always follows ramp 2 (3-51 Ramp 2
Ramp-up Time and 3-52 Ramp 2 Ramp-down
Time) in the range 0 - 3-03 Maximum
Reference. (For closed-loop, see
20-14 Maximum Reference/Feedb.).
[20] Freeze output Freezes actual motor frequency (Hz). The
frozen motor frequency is now the point of
enable/condition for Speed up and Slow to
be used. If Speed up/Slow is used, the
speed change always follows ramp 2
(3-51 Ramp 2 Ramp-up Time and 3-52 Ramp
2 Ramp-down Time) in the range 0 -
1-23 Motor Frequency.
NOTE!
When Freeze output is active, the
Adjustable frequency drive cannot be
stopped via a low 'start [13]' signal.
Stop the Adjustable frequency drive
via a terminal programmed for
Coasting inverse [2] or Coast and reset,
inverse [3].
[21] Speed up For digital control of the up/down speed is
desired (motor potentiometer). Activate this
function by selecting either Freeze
reference or Freeze output. When Speed up
is activated for less than 400 msec. the
resulting reference will be increased by 0.1
%. If Speed up is activated for more than
400 msec., the resulting reference will ramp
according to Ramp 1 in 3-41 Ramp 1 Ramp-
up Time.
[22] Slow Same as Speed up [21].
[23] Set-up select Selects one of the four set-ups. Set par.
bit 0 0-10 to Multi Set-up.
[24] Set-up select Same as Set-up select bit 0 [23].
bit 1 (Default Digital input 32)
®
VLT HVAC Drive Programming Guide
2 1 0 [32] Pulse input
0 0 0
0 0 1
[34] Ramp bit 0
0 1 0
0 1 1
1 0 0
[36] Mains failure
1 0 1
1 1 0
1 1 1
[37] Fire mode
[52] Run
[53] Hand start
MG11CD22 - VLT ® is a registered Danfoss trademark
Select Pulse input when using a pulse
sequence as either reference or feedback.
Scaling is done in parameter group 5-5*.
Select which ramp to use. Logic "0" will
select ramp 1 while logic "1" will select
ramp 2.
Select to activate function selected in
inverse 14-10 Mains Failure. Line failure is active in
the Logic "0" situation.
A signal applied will put the Adjustable
frequency drive into Fire Mode and all
other commands will be disregarded. See
24-0* Fire Mode.
The input terminal, for which the Run
Permissive permissive has been programmed must be
logic "1" before a start command can be
accepted. Run permissive has a logic 'AND'
function related to the terminal which is
programmed for START [8], Jog [14] or
Freeze Output [20], which means that in
order to start running the motor, both
conditions must be fulfilled. If Run
Permissive is programmed on multiple
terminals, Run permissive needs only be
logic '1' on one of the terminals for the
function to be carried out. The digital
output signal for Run Request (Start [8], Jog
[14] or Freeze output [20]) programmed in
parameter group 5-3*, or parameter group
5-4*, will not be affected by Run Permissive.
NOTE!
If no Run Permissive signal is applied
but either Run, Jog or Freeze
commands is activated, the status line
in the display will show either Run
Requested, Jog Requested or Freeze
Requested.
A signal applied will put the Adjustable
frequency drive into Hand mode as if
button Hand On on the LCP has been
pressed and a normal stop command will
be overridden. If disconnecting the signal,
the motor will stop. To make any other
start commands valid, another digital input
must be assigned to Auto-Start and a signal
applied to this. The Hand On and Auto On
buttons on the LCP has no impact. The Off
button on the LCP will override Hand Start
and Auto-Start. Press either the Hand On or
Auto On button to make Hand Start and
Auto-Start active again. If no signal on
either Hand Start or Auto-Start, the motor
will stop regardless of any normal Start
command applied. If signal applied to both
3 3
3-43