VLT
®
8000 AQUA
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,butSafety 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
1)
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
reversingusingthesamesignal.
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 mains 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.
NB!:
If Freeze output is active, the frequency
converter cannot be stopped via terminal
18. The frequency converter 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 spee
disdesired.
This function is only active if Freeze reference or
Freeze output has been selected.
As long as there is a logic "1"
on the terminal selected
for Speed up, the reference or the output frequency will
increase by the Ramp-up time set in parameter 206.
Aslongasthereisalogic"1
" on the terminal selected for
Speed down, the reference or the output frequency will
decrease by the Ramp-down time set in parameter 207.
Pulses (logic "1" mini
mum high for 3 ms and a minimum
pause of 3 ms) will lead to a change of speed of 0.1%
(reference) or 0.1 Hz (output frequency).
Example:
Terminal Terminal Freeze ref./
(16) (17) Freeze output
No speed
change
001
Speed down 0 1 1
Speed up 1 0 1
Speed down 1 1 1
The speed reference, frozen via the control panel,
can be changed even if the frequency converter has
stopped. In addition, the frozen reference will be
remembered in case of a mains failure.
Run permissive. Theremustbeanactivestart
signal via the terminal, where Run permissive has
been programmed, before a start command can be
accepted. Run permissive has a logic ‘AND’ function
related to Start (terminal 18, parameter 302 Terminal
18, Digital input), which means that in order to start
the motor, both conditions must be fulfilled. If Run
permissive is programmed on several terminals, Run
permissive must only be logic "1" on one of the
terminals for the function to be carried out.
Jog is used to override the output frequency to
the frequency set in parameter 209 Jog frequency
and issue a start command. If local reference is
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
120
To Next Page
Loading...
Need help?
General