User Manual

Faults and alarms

Overview of faults and alarms

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SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013

3.1 Overview of faults and alarms

3.1.1 General

Fault and alarm displays (messages)

If a fault occurs, the drive indicates the fault and/or alarm.

For example, the following methods for displaying faults and alarms are available:

• Display via the fault and alarm buffer with PROFIBUS/PROFINET

• Display online via the commissioning software

• Display and operating unit (e.g. BOP, AOP)

Differences between faults and alarms

The differences between faults and alarms are as follows:

Tabelle 3-1 Differences between faults and alarms

Type Description

Faults What happens when a fault occurs?

• The appropriate fault reaction is initiated.

• Status bit ZSW1.3 is set.

• The fault is entered in the fault buffer.

How are faults eliminated?

• Remove the original cause of the fault.

• Acknowledge the fault.

Alarms What happens when an alarm occurs?

• Status signal ZSW1.7 is set.

• The alarm is entered in the alarm buffer.

How are alarms eliminated?

• Alarms acknowledge themselves. If the cause of the alarm is no lon-

ger present, they automatically reset themselves.