Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 69

Parameter Description
parameter 3-52 Ramp 2 Ramp Down Time) in
the range 0–parameter 3-03 Maximum
Reference.
[20] Freeze Freezes actual motor frequency (Hz). The
output 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
(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.
NOTICE
When freeze output is active, the
frequency converter cannot be
stopped via a low [13] start signal.
Stop the frequency converter via a
terminal programmed for [2] Coasting
inverse or [3] Coast and reset, inverse.
[21] Speed up Select [21] Speed up and [22] Speed down if
digital control of the up/down speed is
desired (motor potentiometer). Activate this
function by selecting either [19] Freeze ref or
[20] Freeze output. When speed up/down is
activated for less than 400 ms, the resulting
reference is increased/decreased by 0.1%. If
speed up/down is activated for more than
400 ms, the resulting reference follows the
setting in ramping up/down parameters 3-
x1/3-x2.
[22] Speed down Same as [21] Speed up.
[23] Set-up select Selects 1 of the 4 set-ups. Set
bit 0 parameter 0-10 Active Set-up to [9] Multi Set-
up.
[24] Set-up select Same as [23] Set-up select bit 0.
bit 1 (Default: Digital input 32).
[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 parameter
group 24-0* Fire Mode.
[39] Day/ Night Day or night indication for day/night control
Control feature. Low voltage on the selected digital
input indicates day, while high voltage
indicates night.
[52] Run 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 [8] Start, [14] Jog, or [20]
Freeze Output. To start running the motor,
both conditions must be fulfilled. If run
permissive is programmed on multiple
terminals, [52] Run permissive only has to be
logic 1 on 1 of the terminals to carry out the
function. The digital output signal for run
MG16H202
Programming Guide
[53] Hand start
[54] Auto start
[55] DigiPot
Increase
[56] DigiPot
Decrease
[57] DigiPot Clear
[62] Reset
Counter A
[65] Reset
Counter B
[66] Sleep Mode
[78] Reset
Preventive
Maintenance
Word
Danfoss A/S © 05/2016 All rights reserved.
request ([8] Start, [14] Jog, or [20] Freeze
output) programmed in parameter group 5-3*
Digital Outputs, or parameter 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 are 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-on mode as if [Hand
On] was pressed on the LCP, and a normal
stop command is overridden. If discon-
necting the signal, the motor stops. To make
any other start commands valid, assign
another digital input to [54] Auto Start and
apply a signal to this. The [Hand On] and
[Auto On] keys on the LCP have no impact.
The [Off] key on the LCP overrides [53] Hand
Start and [54] Auto Start. Press either [Hand
On] or [Auto On] to reactivate [53] Hand Start
and [54] Auto Start. If no signal on neither
[53] Hand Start nor [54] Auto Start, the motor
stops regardless of any normal start
command applied. If signals are applied to
both [53] Hand Start and [54] Auto Start, the
function is auto start. If pressing [Off] on the
LCP, the motor stops regardless of signals on
[53] Hand Start and [54] Auto Start.
A signal applied puts the frequency
converter into auto-on mode as if [Auto On]
has been pressed. See also [53] Hand Start.
Uses the input as an increase signal to the
digital potentiometer function described in
parameter group 3-9* Digital Pot.Meter.
Uses the input as a decrease signal to the
digital potentiometer function described in
parameter group 3-9* Digital Pot.Meter.
Uses the input to clear the digital potenti-
ometer reference described in parameter
group 3-9* Digital Pot.Meter.
Input for reset of counter A.
Input for reset of counter B.
Forces frequency converter into sleep mode
(see parameter group 22-4* Sleep Mode).
Reacts on the rising edge of signal applied.
Resets all data in
parameter 16-96 Maintenance Word to 0.
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