The enable signal of the closed-loop/open-loop controller is signaled when one of the following
conditions is satisfied:
● When after grounding the drive, an insulation resistance near 0 Ω is set.
● When the "Ground-fault monitoring (stator) fault status" signal has triggered.
This concept ensures a high degree of protection against residual voltages.
Check that the following prerequisites are satisfied before you switch on the drive:
● The doors are closed.
● The make-proof grounding switch is open.
● The insulation resistance is in the normal range.
If these conditions are fulfilled, you can start the drive.
Insulation monitoring
The deployed insulation monitoring device has an external delete input. This input is
interconnected in such a way that the fault messages are automatically acknowledged at the
insulation monitoring device.
If the drive ground is removed, the insulation resistance changes from short-circuit to the
system-specific setpoint.
The fault message is acknowledged.
8.5.3
Diagnosis
8.5.3.1
Indicating and rectifying faults
The drive provides many protection functions. These protection functions protect the drive
against damage in a fault situation. A distinction is made between the following messages:
● Fault
A fault is a message from the drive indicating a fault or other exceptional (unwanted) state.
The cause can be a fault in the drive itself or also an external fault. This fault, for example,
could have been issued by the winding temperature monitoring of the asynchronous motor.
The faults are displayed and can be reported to a higher-level control system. Once you
have eliminated the cause of the fault, you must acknowledge the fault message.
● Alarm
An alarm is the response to a fault condition identified by the drive, that does not result in
the drive being shutdown. Alarms acknowledge themselves. If the cause is no longer
present, the alarms reset themselves automatically.
Operation
8.5 Fault and system messages
SINAMICS SM150 6SL3845-7NN46-7AA0
148
Operating Instructions 04/2017
Содержание SINAMICS SM150
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Страница 192: ...Spare parts SINAMICS SM150 6SL3845 7NN46 7AA0 192 Operating Instructions 04 2017 ...
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