Siemens SINAMICS DCM Manual page 371

Operation
9.3 Controlling via the AOP30 operator panel
Parameters disable (factory setting: Not active)
● Active: Parameters cannot be changed unless a password is entered. Parameters are
assigned in the same way as in the operator inhibit lock state. If you try to change
parameter values, the message "Note: Parameters disable active" is displayed. All the
control keys, however, remain enabled.
Access level (factory setting: Expert):
The different parameters required for this complex application are filtered so that they can be
displayed as clearly as possible. You select them according to the access level.
An expert level, which must only be used by expert personnel, is required for certain actions.
9.3.8 Faults and alarms
Displaying faults and alarms
If a fault occurs, the drive displays the fault(s) and/or alarm(s) on the operator panel. Faults
are indicated by means of the red "FAULT" LED lighting up.
The "Fault/alarm overview" also appears automatically in the following two cases:
1. When a fault is registered while the system is ramping up
2. If the first fault is registered on the operation screen
You can use the F1 (Help) function on the screen to call up information about the cause of
the fault and how to remedy it. You can use F5 (Ack.) to acknowledge a stored fault.
Any alarms that are pending are indicated by means of the yellow "ALARM" LED lighting up.
Additionally, a note relating to the cause of the alarm is displayed in the status bar of the
operator panel.
What is a fault?
A fault is a message from the drive indicating an error or other exceptional (unwanted)
status. This could be caused by a fault within the converter or an external fault triggered, for
example, by the winding temperature monitoring function for the motor. The faults are
displayed and can be reported to a higher-level control system via PROFIBUS.
What is an alarm?
An alarm is the response to a fault condition identified by the drive. It does not result in the
drive being switched off and does not have to be acknowledged. Alarms are "self-
acknowledging"; that is, they are reset automatically when the cause of the alarm has been
eliminated.
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Operating Instructions, 02.2015, A5E34763375/RS-AA/001
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SINAMICS DCM DC Converter