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MPH-02, MPB-02, MPD-02
Functional Description
Function of the Module Bus
Hierarchy of Status Information
Resetting Error Messages of the
Supply Unit
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Information on the Module Bus
The module bus establishes the exchange of signals between the
inverters or converters or from the inverters to the supply unit.
Independent of the master communication, this allows the devices to
exchange information on internal status variables of the drive system and
error situations without delay. Axis drives and supply units can therefore
react in a coordinated way.
The module bus transmits the following information:
• With regard to the supply unit:
• supply unit ready for operation
• ready for power output
• DC bus voltage in or outside of allowed range of values
• warning against overload of supply unit
• signal for resetting supply errors
• With regard to inverters or converters
• inverters or converters ready for operation
The status information transmitted by inverter (IV), supply unit (SU) or
converter (CV) to the module bus has a hierarchical order.
Status information
resetting of supply errors
supply units or converters not ready for
operation ("supply error")
inverters or converters not ready for
operation ("inverter error")
failure of DC bus supply ("DC bus not ok",
in operation)
prewarning "supply overload"
DC bus ready for power output ("DC bus
ok", after switching power voltage on)
all module bus nodes error-free
1):
Only if F8 errors signaled at supply unit (P-0-0118).
2):
Only if F2/F4/F6 errors signaled in drive system (P-0-0118).
Fig. 6-57:
Module bus status information and hierarchy
If several parts of status information from one or several module bus
nodes are present at the same time, the status information highest in
hierarchy determines the signal status of the module bus.
Error messages of supply unit output via:
• display of supply unit
- and -
• inverter or converter connected at module bus (collective error
message F2086 Error supply module)
Drive Control
generated by
Priority in
hierarchy
SU
CV
IV
X
X
high
1)
X
X
X
2)
2)
X
X
X
X
X
X
X
X
X
X
X
low
6-83
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