Configuration Mode (ConF)
Load variation detection
This detection is only poss ible with the High-s peed hoisting function. It can be us ed to detect if an obs tacle
has been reached, triggering a s udden (upward) increase or (downward) decrease in the load.
Load variation detection triggers a
[Dynamic load fault]
(dLF). The
[Dyn. load Mgt.]
(dLb) param eter can
be us ed to configure the res pons e of the drive in the event of this detected fault.
Load variation detection can als o be as signed to a relay or a logic output.
There are two poss ible detection m odes, depending on the configuration of high-s peed hoisting:
•
Speed reference m ode
[High speed hoisting]
(HSO) page 205 is s et to
[Speed ref]
(SSO).
Torque variation detection.
During high-s peed operation, the load is com pared to that meas ured during the s peed s tep. The
perm is sible load variation and its duration can be configured. If exceeded, the drive switches to fault m ode.
•
Current lim itation m ode
[High speed hoisting]
(HSO) page 205 is s et to
[Current Limit]
(CSO).
On ascend, during high-s peed operation, an increas e in load will res ult in a drop in s peed. Even if high-
speed operation has been activated, if the m otor frequency drops below the
[I Limit Frequency]
(SCL)
thres hold page 205, the drive will switch to fault m ode. The detection is realised only for a pos itive variation
of the load and only in the high s peed area (area upper to
[I Limit Frequency]
(SCL)).
On descend, operation takes the form of Speed reference m ode.
Code Nam e / De s cription Adjustment range Factory setting
Load variation detection. This can be accessed if
[High s peed hoisting]
(HSO) page
205
is not
[No]
(nO).
tLd
nO
-
[Dynamic load time]
[No]
(nO)
Activation of load variation detection and adjustment of time delay for taking load variation detected fault
[Dynam ic load fault]
(dLF) into account.
[No]
(nO): No load variation detection
0.00 s to 10.00 s
: Adjustment of the time delay for taking detected fault into account.
dLd
[Dynamic load threshold]
1 to 100% 100%
Adjustment of the threshold for load variation detection, as a % of the load measured during the speed step.
dLb
[Dyn. load Mgt.]
[Freew heel]
(YES)
nO
Behavior of the drive in the event of a load variation detected fault.
[Ignore]
(nO): Detected fault ignored
[Freew heel]
(YES): Freew heel stop
[Per
STT]
(
Stt
):
Stop
according
to
configuration
of
[Type
of
stop]
(
St
t
)
page
173,
without
tripping.
In
this
case,
the
fault
relay does not open and the drive is ready to restart as soon as the detected fault disappears, according to the restart conditions
of
the
active
command
channel,
(for
example,
according
to
[2/3
wire
cont rol]
(
tCC
)
and
[2
wire
type]
(
tCt
)
page
125
if
control is via the terminals). Configuring an alarm for this detected fault is recommended (assigned to a logic output, for example)
in order to indicate the cause of the stop
[Fallback spd.]
(LFF): Change to fallback speed, maintained as long as the detected fault persists and the run command has
not been removed (1)
[Spd m aint.]
(rLS):
The drive maintains the speed at the time the detected fault occurred, as long as the detected fault persists
and the run command has not been removed (1)
[Ram p s top]
(rMP): Stop on ramp
[Fast s top]
(FSt): Fast stop
LFF
rLS
rMP
Parameters described in this page can be accessed by:
DRI- > CONF > FULL > FLT- > DLD-
To Next Page
Loading...
