Operation Principle Diagram - ABB +Q950 User Manual

Prevention of unexpected start-up option for multidrives

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Table Of Contents

Table of Contents

POUS indication delay (see parameter POUS.13): An additional security delay. The POUS completed

indication (parameter POUS.22) becomes active after this delay.

1. The user stops the motor(s).

2. After the motor(s) have stopped, the user switches the POUS switch off (open). The

FSO module activates the inverter unit STO function.

Note: If the user activates the POUS function when the motor is running, the FSO

module activates the inverter unit STO function, the motor(s) coasts to a stop and the

FSO module generates a fault.

3. After time A has elapsed, the POUS indication lamp turns on (POUS completed

indication).

4. The user switches the POUS switch on (closed). The FSO module deactivates the

inverter unit STO function and turns off the POUS indication lamp. The user can start

the motor(s) again.

Note: In this case, automatic acknowledgement of the POUS function is selected

(parameter POUS.02).

5. The user restarts the motor(s).

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