Operating Instructions

4 Faults and alarms
4.1 Overview of faults and alarms
SINAMICS G120 CU230P-2 Control Units
654 List Manual (LH9), 04/2014, A5E33838102B AA
4.1 Overview of faults and alarms
4.1.1 General information
Fault and alarm displays (messages)
In the case of a fault, the drive signals the corresponding fault(s) and/or alarm(s).
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:
Table 4-1 Differences between faults and alarms
Type Description
Faults What happens when a fault occurs?
• The appropriate fault reaction is triggered.
• 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 removed?
• Alarms acknowledge themselves.
If the cause of the alarm is no longer present, they automatically reset
themselves.