KEB combivert R6-S, Applications Manual

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Protective functions
© KEB, 2008-02 COMBIVERT R6-S Seite 3.6 - 9
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3.6.3 Automatic restart
With the automatic restart, the COMBIVERT resets the error automatically or clears it automatically by a mal-
function.
The automatic restart only makes sense if the error can be expected based on the application. Normally, the
cause of the error must first be investigated and eliminated before the drive can be put back in operation by
executing the reset.
Therefore, it must be selected after which errors an automatic restart should be executed.
Attention:
Because of the independent starting of the machine safety measures must
be provided for operating personnel and machine!
3.6.3.1 Undervoltage error (E.UP)
In Pn.00 „automatic restart E.UP“, the automatic restart for the undervoltage error is activated in the factory
setting.
A typical application for the automatic restart E.UP (Pn.00) is operation on a bad power grid where sporadic
voltage dips are to be expected. With this function, the application continues running as soon as the mains
voltage is sufficiently high again.
3.6.3.2 Overvoltage error (E.OP)
The error overvoltage usually occurs at deceleration in connection with an overcurrent error. At automatic re-
start the blocking time modulation is at least one second.
3.6.3.3 Overcurrent error (E.OC)
The automatic restart after occurence of an overcurrent error is activated with Pn.02 „auto retry OC“. It can be
used at burst-like overloads.
The blocking time modulation will proceed as in overvoltage errors.
After 10 restart attempts, the inverter state must be unequal to the blocking time modulation or the overcurrent
error for at least one second, otherwise the restart is aborted.
3.6.3.4 Malfunction messages and pre-warnings
A malfunction response with automatic restart is selected in parameters Pn.03, Pn.05, Pn.08, Pn.09, Pn.10,
Pn.11, Pn.12, Pn.14, Pn.16, Pn.18 with the value.