9.12.6
Setting Current limit
Motor Setup
Current limit
As an additional safety function the device has a current limit, this can be adapted if
necessary.
The setting refers to the motor rated current of the device (100 % = setting: MotorRa-
tedCurr.).
On exceeding the percentage value set here, the modulation is reduced until the set
current is set again. This prevents overloading of the motor.
Setting range: 100...130 %
Factory setting: 120 %
120 %
Current limit
Info
OL
The active current limit is indicated in the display by the symbol
OL
23.4
°
C
E1 Actual
9.12.7
Setting brake function
Motor Setup
DC brake mode
Setting function of DC-brake for frequency inverters.
For units that come with a factory engaged DC brake mode (if extant,
DC brake
mode setting), simultaneously activating the
“
DC brake mode
”
only makes sense in
exceptional cases.
0
= no brake function (factory setting).
1
= brakes before start (before modulation is returnd)
If, under certain circumstances, the modulation switches back on while the motor is still
rotating fast, this can result in a re-supply of the inverter
’
s
“
overcurrent disconnection
”
.
The brake function can be activated to prevent this. This is then always active for an
adjustable period before triggering starts. I.e., the brake function is always initiated
before modulation after has it returned to
“
0
”
. The suitable adjustments depend on the
centrifugal force of the motor and the conditions in the installation.
2
= Special function, brakes before stop (as soon as modulation
“
0
”
).
The motor does not run out up to stop. The motor is braked actively, as soon as no
modulation is present (Setpoint =
“
0
”
or Enable =
“
OFF
”
) .
Test required. The
“
min. speed
”
adjustment must be set to
“
0
”
.
Attention! With the frequently one behind the other following DC bracings it can come
to strong heating up of the motor.
To prevent any overheating, motor protection in the form of a temperature limiter
installed in the motor is required (
motor protection).
0
DC brake mode
Motor Setup
DC brake time
Maximal length of DC-brake for frequency inverters.
If the braking is activated, the d.c. brake torque is active for this time.
Setting range: 0...250 sec.
factory setting: 5 / 10 sec. (depending on device type)
5 sec
DC brake time
Operating Instructions
Fcontrol
–
model series FXDM25/32AM
Programming
L-BAL-E212-GB 1451 Index 003
Part.-No.
92/123
