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
fulfilled. 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 affected 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 [Off] 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.
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