Danfoss VLT 5000 Instruction Manual page 29

Precedence of the stop commands
is:
Coast stop
The drive output stops immediately
and the motor coasts to a stop.
Quick stop
The drive output frequency ramps
down to 0 Hz according to time set
in parameter 207 (212), Ramp Down
Time.
DC brake stop
The drive brakes the motor to a stop
using DC injection braking.
28
1. Coast stop
2. Quick stop
3. DC brake stop
4. Ramp stop
• Drive display show UN.READY
(unit ready) when coast stop
is active.
• Drive cannot run in any mode.
• Parameter 503
Coasting stop, determines
interaction with input 27.
• Drive display shows STOP.
• Drive cannot run in AUTO
mode but can run in HAND
mode.
• Parameters 114 (125) and 115
(126) determine amount and
time of DC current applied for
braking.
• Drive display shows DC STOP .
• Drive cannot run in AUTO
mode but can run in HAND
mode.
• Parameter 504, DC Brake,
determines interaction with
input 27.
VLT ® 5000 / VLT
Ramp stop
The drive output frequency ramps down to
0 Hz according to time set in parameter
207, Ramp Down Time.
• Factory setting is 60 sec for fan
• Drive display shows STAND BY.
• Drive can run in HAND mode or
• Parameter 505, Start, determines
(502),
Drive Speed Setpoint
With this input variable it is possible to
give the Drive a Start/stop signal and a
reference.
S t a t e S t a t e
S t a t e S t a t e Ref. value S t a t e
0
1
1
0xFF
Default is Auto.
MG.60.N1.22
® 6000 HVAC / VLT ®
applications and 10 sec for most
pump applications.
AUTO through a digital input
command.
interaction with input 18.
Ref. value Ref. value C o m m a n d C o m m a n d
Ref. value Ref. value C o m m a n d C o m m a n d C o m m a n d
- Stop
0 Run, Ref. = 0%
0-100% Run, Ref. = 0-100%
- Auto (invalid)
- VLT is a registered Danfoss trademark
8000 AQUA