GE Industrial Solutions 6KCV301PDP33 Profibus - DP Bus for AV300i - Manual (Page 23)

5
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—————— ALARMS ——————
Profibus-DP
5.0 ALARMS
5.1 PROFIBUS-DP ALARMS
The alarms indicated to the drive by the 6KCV301PDP33 card are the following:
1 - Bus loss: if an accidental interruption of the connection occurs, this alarm
is generated.
2 - 6KCV301PDP33 Hardware Fault: if the 6KCV301PDP33 card is faulted,
this alarm is generated.
The alarm handling carried out by the drive depends on the drive itself and
how the alarms are configured.
If the Master is switched off before the Slave, the Bus-Loss alarm occurs; the
drive handles this event by not storing the alarm in order to avoid having the
alarm annunciated when the drive is next switched on.
The communication between Master and Slave can only be carried out if the
initialization of the drive and of the 6KCV301PDP33 card is successfully
terminated; if not, it is not possible to determine the cause of the erroneous
initialization using the Bus.
5.2 DRIVE ALARMS HANDLING
The drive reports automatically its status to the 6KCV301PDP33 card, if an
alarm condition occurs.
When the communication is established, the drive status is sent to the Master
in at the moment in which the drive initialization has terminated.
Every time the Drive changes its status, the 6KCV301PDP33 card sends the
updated drive status to the Master by means of a diagnostic message ( please
refer to “Draft Standard DIN 19245 Part 3” sect. 8.3.1 ).
The information are contained in the ‘User Specific Diagnostic Data’ field of
the diagnostic message.
This field is made up of three Bytes. The first contains the ‘User Specific
Diagnostic Data Length (in bytes)’ and is set to three. The second and the third
contains the code of the drive status (for the code please refer to the drive
manual). When a drive alarm occurs, also the ‘Ext_Diag’ bit in the first Byte
of the ‘Diagnostic Data’ is set to 1.