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MPH-02, MPB-02, MPD-02
Diagnosis of Module Bus Status
Power On
Soft Start
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Note:
The exact causes of this warning are shown on the display of
the supply unit or converter by detailed diagnostic message
texts.
The control information currently transmitted by an inverter or converter to
the module bus is displayed in P-0-0460, Module group, control word.
The messages currently available on the module bus are displayed in
P-0-0461, Module group, status word.
See also Parameter Description "P-0-0460, Module group, control
word" and "P-0-0461, Module group, status word"
Basics on Power Supply
Supply units and the supply section of a converter provide the DC bus
voltage for the inverters or the inverter section of the converter.
The mains voltage for charging the DC bus can only be switched on when
all devices connected via the module bus are signaling the status "error-
free". If one of the devices displays an error,
• the activation of the internal mains contactor is prevented for supply
units,
• the activation of the external mains contactor is prevented (message
E2810 Drive system not ready for operation) for converters by the
opened "Rel1" contact that has to be available in the switch-off path of
the mains contactor.
Note:
For this reason the status information "supply ready for
operation" (respective bit in P-0-0861, Status word of power
section) has to be assigned to the "Rel1" contact of the
control section for converters; no other signal may be
assigned to this contact. Otherwise it is possible to switch
power on although an error condition is present!
Note:
Recommendations on the hardware-side control of supply
units or converters are contained in the documentation of the
respective device.
When the mains voltage is switched on, the DC bus is charged via a so-
called "soft start device". This limits the charging current for the DC bus
first uncharged to the value indicated in the documentation of the
respective device.
The soft start causes a "charging time" between the activation of the
mains voltage and the minimum voltage in the DC bus required for power
output. The charging time is monitored; when a maximum time has been
exceeded, the following error is signaled:
• F2816 Softstart fault power supply unit
(displayed for supply unit and converter)
The soft start error is transmitted as a supply error to the other devices via
the module bus
• F2086 Error supply module
(displayed for inverter or further converters)
If the soft start process has been successfully completed, the supply
signals via the module bus that the DC bus is ready for power output ("ZK
ok" = "DC bus ok").
6-85
Drive Control
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