Danfoss VLT Series Programming Manual page 65

Parameter Description
3 3
[20] Freeze output
[21] Speed up
[22] Speed down
[23] Set-up select
bit 0
[24] Set-up select
bit 1
[32] Pulse input
[34] Ramp bit 0
[36] Mains failure
inverse
[37] Fire mode
[52] Run
Permissive
64
®
VLT HVAC Drive Programming Guide
condition for Speed up and Speed down to
be used. If Speed up/down 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.).
Freezes actual motor frequency (Hz). The
frozen motor frequency is now the point of
enable/condition for Speed up and Speed
down to be used. If Speed up/down 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
frequency converter cannot be
stopped via a low 'start [13]' signal.
Stop the frequency converter via a
terminal programmed for Coasting
inverse [2] or Coast and reset, inverse
[3].
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.
Same as Speed up [21].
Selects one of the four set-ups. Set par.
0-10 to Multi Set-up.
Same as Set-up select bit 0 [23].
(Default Digital input 32)
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
14-10 Mains Failure. Mains failure is active in
the Logic "0" situation.
A signal applied will put the frequency
converter into Fire Mode and all other
commands will be disregarded. See 24-0*
Fire Mode.
The input terminal, for which the Run
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
MG.11.CC.02 - VLT
[53] Hand start
[54] Auto start
[55] DigiPot
Increase
[56] DigiPot
Decrease
[57] DigiPot Clear
[60] Counter A (up) (Terminal 29 or 33 only) Input for increment
[61] Counter A
(down)
®
is a registered Danfoss trademark
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 frequency
converter 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 assign
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 neither Hand Start nor
Auto Start, the motor will stop regardless of
any normal Start command applied. If
signal applied to both Hand Start and Auto
Start, the function will be Auto Start. If
pressing the Off button on the LCP the
motor will stop regardless of signals on
Hand Start and Auto Start.
A signal applied will put the frequency
converter into Auto mode as if the LCP
button Auto On has been pressed. See also
Hand Start [53]
Uses the input as an INCREASE signal to the
Digital Potentiometer function described in
parameter group 3-9*
Uses the input as a DECREASE signal to the
Digital Potentiometer function described in
parameter group 3-9*
Uses the input to CLEAR the Digital Potenti-
ometer reference described in parameter
group 3-9*
counting in the SLC counter.
(Terminal 29 or 33 only) Input for
decrement counting in the SLC counter.