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Universal Motor Controller
UMC100-FBP
Technical Description
Emergency Start
In some special cases a motor must be started even if the thermal overload protection would prevent the
start (i.e. cooling time is still running). To allow the start in such situations the thermal memory of the UMC
can be reset to cold state. This enables an immediate restart even after a thermal overload trip.
There are two possibilities for an emergency start:
Using the multifunction inputs DI0, DI1 or DI an emergency start is carried out as follows:
1.
Parameterise DI0, DI1 or DI as emergency start input
.
Switch the signal on the parameterised input to 1:
- 0 -> 1 transition to reset the UMC100 thermal memory to "cold motor"
- Continuous 1-signal to ignore fault signals on multi-function inputs (if parameterised as fault inputs)
- Switch on motor
To perform an emergency start from the control system / ieldbus, the following steps must be carried out:
1.
Set Parameter Emergency = On (default is Off)
.
Send command PREPARE EMERGENCY START 0->1 transition via ieldbus to reset the UMC100
thermal memory to „cold motor". A continuous 1-signal ignores fault signals originating from the multi-
function inputs (if parametrized as fault inputs)
3.
Switch on motor
Relevant Parameters:
- Emergency Start
- Multifunction 0,1,2
UMC100-FBP
Caution: Starting a hot motor can cause motor damage or destruction of the motor.
- 5 -
V 6
FieldBusPlug / Issue: 08.009
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