Danfoss VLT HVAC Basic Drive Programming Manual page 37

Parameters
[20] Freeze output
[21] Speed up
3 3
[22] Speed down
[23] Set-up select bit
0
[34] Ramp bit 0
[37] Fire mode
[52] Run permissive
36
VLT HVAC Basic Drive Programming Guide
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
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], but reference
decreases.
Selects one of the two set-ups. Set
0-10 Active Set-up to Multi Set-up.
Select which ramp to use. Logic "0" will
select ramp 1 while logic "1" will select
ramp 2.
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
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
par. 5-3*, or par. 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.
MG.18.B1.02 - VLT
[53] Hand Start
[54] Auto start
[60] Counter A (up)
[61] Counter A
(down)
[62] Reset Counter A Input for reset of counter A.
[63] Counter B (up)
[64] Counter B
(down)
[65] Reset Counter B Input for reset of counter B
Selected preset Preset ref. bit 2 Preset ref. bit 1 Preset ref. bit
ref.:
Preset
reference 1
Preset
reference 2
Preset
reference 3
Preset
reference 4
Preset
reference 5
Preset
reference 6
Preset
reference 7
Preset
reference 8
Table 3.1 Selected preset reference
®
is a registered Danfoss trademark
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.
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].
Input for increment counting in the SLC
counter.
Input for decrement counting in the SLC
counter.
Input for increment counting in the SLC
counter.
Input for decrement counting in the SLC
counter.
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0
1
0
1
0
1
0
1