Limit The Number Of Starts; Emergency Start - ABB UMC100-FBP Technical Description

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 DI2 an emergency start is carried out as follows:
1. Parameterise DI0, DI1 or DI2 as emergency start input
2. 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 / fieldbus, the following steps must be carried out:
1. Set Parameter Emergency = On (default is Off)
2. Send command PREPARE EMERGENCY START 0->1 transition via fieldbus 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

Limit the Number of Starts

This function allows to limit the number of starts withing a defined time window. The length of the window
can be set with the parameter "Num Starts Window". The numbers of permissible starts in this window
can be set with parameter "Num Starts Allowed".
If there is only one start left a user defined reaction can be triggered. See parameter "Num Starts Pre-
warn". If no start is left anymore but a start command is given a user defined reaction can be triggered.
See parameter "Num Starts Overrun".
An optional pause time "Num Starts Pause" can be set to define a waiting time after the motor was stop-
ped that has to pass until a new start is possible. The running pause time is indicated with a flashing "t"
symbol on the LCD panel. The remaining time until a new start is possible can be also displayed on the
LCD panel and sent via fieldbus.
UMC100-FBP
Caution: Starting a hot motor can cause motor damage or destruction of the motor.
- 64 - FieldBusPlug / Issue: 03.2012