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Page 7.13 - 40 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Protective functions
7.13.12 Special functions
In these parameters, many different functions for adapting the inverter behaviour to special applications are
pooled.
Pn.65: Special functions
Bit Meaning Explanation
0
1: GTR7 function
for LS
GTR7 function also available in status "70: standstill (Modulation off)" (LS) *1
1 2: Pn.04 = E.UP
With the selected input in Pn.04 „ext. fault input select“, „Error! Undervoltage" is
triggered (not „Error! external input“). This can achieve that, for coupled drives, all
inverters simultaneously go to undervoltage as soon as there is a voltage dip on
one of the inverters, and all inverters also execute an automatic restart simulta-
neously when the mains voltage returns to the valid range on all inverters. The
undervoltage error from the DC link voltage measurement remains active.
2
4: Behaviour if LT
not ready
The status "13: Power circuit not ready" (nO_PU), which the inverter enters for
an unpowered power circuit, is not treated as an error. That means, the switching
conditions 4..6 are not met and the bit 1 in status word "Error" is not set.
3
8: GTR7 release on
error
GTR7 function also available if the inverter is in an error state. Exception: On
opening of the hardware control release (terminal X2A.16) and for an unpowered
power circuit (status 13: power circuit not ready), the GTR7 is always switched
off. *1
4
16: OL2 tempera-
ture-dependent On activation of this bit, the current limit for the overload protection in the lower
speed range (OL2-function) is dependent on the heat sink temperature
5
32: GTR7 function
for SW nop
The terminal ST causes an immediate hardware switch-off of the GTR7. If the
GTR7 function shall be available in status „0: no control release“ (nop) the
software control release must be used (can be activated via di.36). The GTR7
can then be activated for the status "no control release" with bit 5. Exception:
On opening the hardware control release (terminal X2A.16), the GTR7 is always
switched off. *1
6
64: OL2 Derating
limiting
For switching frequencies above the rated switching frequency, the current limit
for the overload protection in the lower speed range is reduced. On activation
of this bit, the inverter reduces the switching frequency to the rated switching
frequency to prevent the error "Overload in standstill" (E.OL2).
7
128: E.UP = no
error on nop+LS
The status "2: ERROR! undervoltage" (E.UP) is not treated as an error if the rota-
tion setting or the control release is missing. That means, the switching conditions
4..6 are not met and the bit 1 in status word "Error" is not set.
8
256: BBL is not
displayed
The status "76: motor de-excitation" (bbL) is not displayed anymore. Advantage:
the cause of the deactivation of the modulation (e.g. error) is immediately visible
in ru.00 and can be evaluated by an external control. Disadvantage: Since a reset
of an error is only possible after expiration of the base-block time, it is not appa-
rent without display when a reset can be executed.
9
512: Status termi-
nation = RUN
Bit 2 in SY.51 "status word (low) normally displays "Start" if the modulation is swit-
ched on. Exception: If a positioning is aborted via the bit 11 "Termination" in the
control word, then the status word displays "Stop" as soon as the drive reaches
speed 0 (even if modulation is still active). This exception can be revoked by
activation of bit 9.
10 1024: A.XX = error
If this bit is active, the ERROR-bit in status word SY.51 and the switching condi-
tion that responds to an error are set in case of a malfunction (Status warning /
A.XX).
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