VLT
®
8000 AQUA
) Global default setting
Function:
In parameters 300-307
Digital inputs,
it is possible to
choose between the different possible functions related
to the digital inputs (terminals 16-33). The functional
options are given in the table on the previous page.
Description of choice:
No function
is selected if the adjustable frequency drive
is not to react to signals transmitted to the terminal.
Reset
resets the adjustable frequency drive after
an alarm; however, not all alarms can be reset (trip
locked) cycling line power supply. See table in
List
of warnings and alarms
. Reset will be activated
on the rising edge of the signal.
Coasting stop, inverse
is used to force the
adjustable frequency drive to "release" the motor
immediately; the output transistors are "turned off"
to remove power to the motor, allowing it to coast
to stop. Logic "0" implements this mode.
Reset and coasting stop, inverse
is used for
activating coasting stop at the same time as reset.
Logic "0" implements coasting stop and reset. Reset
will be activated on the falling edge of the signal.
DC braking, inverse
is used for stopping the motor
by energizing it with a DC current for a given time, see
parameters 114-116
DC brake
. Please note that this
function is only active if the value of parameters 114
DC
brake current
and 115
DC braking
time is different from
0. Logic ‘0
’
implements DC braking. See
DC braking
.
Safety interlock
has the same function as
Coasting
stop, inverse
, but
Safety interlock
generates the alarm
message EXTERNAL FAULT on the display when
terminal 27 is logic ‘0
’
. The alarm message will also be
active via digital outputs 42/45 and relay outputs 1/2,
if programmed for
Safety interlock
. The alarm can be
reset using a digital input or the [OFF/STOP] key.
Start
is selected if a start/stop command is required.
Logic "1" = start, logic "0" = stop.
Reversing
is used for changing the direction of
rotation of the motor shaft. Logic "0" will not
implement reversing. Logic "1" will implement
reversing. The reversing signal only changes the
direction of rotation; it does not activate the start
function. It can not be used in
Closed loop
.
Reversing and start
is used for start/stop and
reversing using the same signal.
A start signal via terminal 18 at the same
time is not allowed.
Is not active together with
Closed loop
.
Freeze reference
freezes the present reference.
The frozen reference can now only be changed
by means of
Speed up
or
Speed down.
The
frozen reference is saved after a stop command
and in case of AC line failure.
Freeze output
freezes the present output frequency
(in Hz). The frozen output frequency can now only
be changed by
Speed up
or
Speed down
.
NOTE
If Freeze output is active, the adjustable
frequency drive cannot be stopped via terminal
18. The adjustable frequency drive can only
be stopped when terminal 27 or terminal 19 has
been programmed for
DC braking, inverse
.
Selection of Setup, lsb
or
Selection of Setup,
msb
enables a choice of one of the four Setups.
However, this assumes that parameter 002
Active
Setup
has been set at
Multi Setup
[5].
Setup, msb
Setup, lsb
Setup 1
0
0
Setup 2
0
1
Setup 3
1
0
Setup 4
1
1
Preset reference, on
is used for switching
between remote reference and preset reference.
This assumes that
Remote/preset
[2] has been
selected in parameter 210
Reference type
. Logic
"0" = remote references active; logic "1" = one of
the four preset references is active in accordance
with the table on the next page.
Preset reference, lsb
and
Preset reference, msb
enables a choice of one of the four preset references,
in accordance with the table below.
Preset ref., msb
Preset ref., lsb
Preset ref. 1
0
0
Preset ref. 2
0
1
Preset ref. 3
1
0
Preset ref. 4
1
1
Speed up
and
Speed down
are selected if
digital control of the up/down speed is desired.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.80.A7.22 - VLT is a registered Danfoss trademark
114
Rosewood STP ST42 General (Operation and Maintenance Manual - Part 4:
Section 6.3 Manufacturers Manuals 6.3.33 Danfoss VLT Aquadrive 8000) Vendor Manual
QP Id: VM207
Active: 03/09/2013
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