Danfoss VLT CDS 803 Programming Guide

Digital input
function
Description
[21] Speed up Select [21] Speed up for digital control of
the up/down speed. Activate this function
by selecting either [19] Freeze reference or
[20] Freeze output. When [21] Speed up is
activated for less than 400 ms, the
resulting reference is increased by 0.1%. If
[21] Speed up is activated for more than
400 ms, the resulting reference ramps
according to Ramp 1 in
parameter 3-41 Ramp 1 Ramp Up Time.
[22] Speed down Same as [21] Speed up, but reference
decreases.
[23] Set-up select bit
0
Selects one of the 2 set-ups. Set
parameter 0-10 Active Set-up to [9] Multi
Set-up.
[32] Pulse Input Select [32] 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.
[52] Run permissive The input terminal, for which [52] Run
permissive has been programmed must be
logic 1 before a start command can be
accepted. [52] 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 compressor, both conditions must be
fullled. If [52] Run permissive is
programmed on multiple terminals, it only
has to 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 parameter group 5-3*
Digital Outputs, or parameter group 5-4*
Relays, is not aected by [52] Run
permissive.
NOTICE
If no [52] 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.
Digital input
function
Description
[53] Hand Start 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 compressor stops. To make
any other start commands valid, another
digital input must be assigned to [54]
Auto Start and a signal applied to this. The
[Hand On] and [Auto On] keys have no
impact. The [O] key overrides [53] Hand
Start and [54] Auto Start. Press either
[Hand On] or [Auto On] to make [53] Hand
Start and [54] Auto Start active again. If no
signal on neither [53] Hand Start nor [54]
Auto Start, the compressor stops
regardless of any normal start command
applied. If signal applied to both [53]
Hand Start and [54] Auto Start, the
function is Auto Start.
[54] Auto start A signal applied puts the frequency
converter into Auto mode as if [Auto On]
has been pressed. See also [53] Hand Start.
[60] Counter A (up) Input for increment counting in the SLC
counter.
[61] Counter A
(down)
Input for decrement counting in the SLC
counter.
[62] Reset Counter A Input for reset of counter A.
[63] Counter B (up) Input for increment counting in the SLC
counter.
[64] Counter B
(down)
Input for decrement counting in the SLC
counter.
[65] Reset Counter B Input for reset of counter B
Table 3.2 Digital Input Functions
Parameters Programming Guide
MG18P202 Danfoss A/S © 06/2019 All rights reserved. 29
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Danfoss VLT CDS 803 Specifications

General

Brand	Danfoss
Model	VLT CDS 803
Category	DC Drives
Language	English