Standard Operation; Abnormal Operation - KEB COMBIVERT R6 Instruction Manual

Introduction
All control card outputs of the R6 are „one-channel, no diagnostic coverage and therefore not
safe" according to ISO 13849. If required, additional protective measures must be met by the
user.
1.5.1

Standard operation

Generally the power supply and regenerative unit is a DC supply. If the DC voltage increases
to a value above the peak value of the mains voltage, regeneration of the current into the
mains occurs automatically. The regenerative level can be defined with parameter CP.34 or
cS.02. The mains voltage is analog measured. Regeneration occurs by square-wave current
curve which corresponds in phase position to the current flow period of a B6 bridge circuit.
Regeneration is completed if the regenerative and puls off level (CP.32 or cS.06) is fallen
below.
1.5.2

Abnormal operation

When exceeding the permissible limit values for voltage, current or temperature the current
flow between DC link and mains is blocked during regeneration. An appropriate error mes-
sage is also displayed during supply. The unit must be disconnected from the supply system
or the load must be switched off in case of overcurrent or overload. This can be done by
opening the control release of the frequency inverter.
At factory setting the modulation is switched off in case of a net phase failure and error mes-
sage E.nEt is displayed.
Special adjustments from KEB are necessary if the modulation and/or the standard operation
should start again within a defined time in case of return of power supply.
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