Danfoss VLT HVAC Basic Drive FC 101 Programming Manual page 41

Parameters
Digital input Description
function
[19] Freeze reference Freeze actual reference. The frozen
reference is now the point of enable/
condition for Speed up and Speed down
to be used. If Speed up/down is used,
speed change always follows ramp 2
(3-51 Ramp 2 Ramp Up Time and
3-52 Ramp 2 Ramp Down Time) in the
range 3-02 Minimum Reference -
3-03 Maximum Reference.
[20] Freeze output Freezes actual reference. The frozen
reference os 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
[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 ms, the
resulting reference is increased by 0.1%. If
Speed up is activated for more than 400
ms, the resulting reference ramps
according to Ramp 1 in 3-41 Ramp 1
Ramp Up Time.
[22] Speed down Same as [21] Speed up, but reference
decreases.
[23] Set-up select bit Selects one of the 2 set-ups. Set
0 0-10 Active Set-up to Multi Set-up.
[32] Pulse Input Select Pulse input when using a pulse
sequence as either reference or feedback.
Scaling is done in parameter group 5-5*
Pulse Input. Available only for Terminal 29
[34] Ramp bit 0 Select which ramp to use. Logic "0"
selects ramp 1 while logic "1" selects
ramp 2.
[37] Fire mode A signal applied puts the frequency
converter into Fire Mode and all other
commands are disregarded. See 24-0* Fire
Mode.
®
VLT HVAC Basic Drive FC 101 Programming Guide
Digital input
function
[52] Run permissive
[53] Hand Start
[54] Auto start
[60] Counter A (up)
[61] Counter A
(down)
[62] Reset Counter A Input for reset of counter A.
MG18B302 - Rev. 2013-09-02
Description
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 [8] Start, [14] Jog
or [20] Freeze Output, which means that 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 ([8] Start, [14] Jog or [20]
Freeze Output) programmed in paramter
group 5-3* Digital Outputs, or paramter
group 5-4* Relays, is not affected by Run
Permissive.
NOTICE
If no Run permissive signal is
applied but either Run, Jog or
Freeze commands is activated, the
status line in the display shows
either Run Requested, Jog
Requested or Freeze Requested.
A signal applied puts the frequency
converter into Hand mode as if [Hand On]
has been pressed and a normal stop
command is overridden. If disconnecting
the signal, the motor stops. 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] keys have no
impact. The [Off] key overrides Hand Start
and Auto Start. Press either [Hand On] or
[Auto On] to make Hand Start and Auto
Start active again. If no signal on neither
Hand Start nor Auto Start, the motor stops
regardless of any normal Start command
applied. If signal applied to both Hand
Start and Auto Start, the function is Auto
Start.
A signal applied puts the frequency
converter into Auto mode as if [Auto On]
has been pressed. See also [53] Hand
Start.
Input for increment counting in the SLC
counter.
Input for decrement counting in the SLC
counter.
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