32 Technical description 8100_A
7.1.7 CONTROLMODEC006
Either Trip or Clamp can be selected as control modes.
In the control mode Trip, the inverter is inhibited, when 160% of the rated current is
exceeded. A fault indicationis displayed (see8). High torque can be obtained for a
short time in this mode.
In the control mode Clamp the motor current is limited to 120% of the rated current.
(Imat' S 1.2 IN)due to permanent peak current limitation. In case of shock load, the
controller will not set trip. The output signal Imax (in case of factory setting terminal
A2) is set, as soon as the peak current limitation cuts in. The red LEDflashes if the
LCD keypad 8120 is used.
Caution: If the motor is stalled, it may overheat in the control mode "Clamp".
7.1.8 LECOM1 ADDRESSC009
For the communication via the LECOM1interface, set the controller address under
code C009 (see4.5).
7.2 OPERATING PARAMETERS
7.2.1 MINIMUM FIELD FREQUENCY fdmin C010
MAXIMUMFIELD FREQUENCY fdmax C011
The set-value setting
is determined via fdmin and fdmax' With zero set-value the drive
accelerates to the minimum speed fdmin after controller enable.
fdminis only effective with analog set-value input and unipolar set-value
(C005 = -0-). fdmaxis a reference value for the setting of the acceleration and
deceleration times Tir and Tif.
With absolute set-value input, e.g. via the LECOMinterface or JOG values, fdmaxis a
limit value.
The chopper frequency of the output voltage set under C018, influences the
effective maximum field frequency. For example, the field frequency with
C018 = -0- (fCh = 1.0 kHz) is limited to 120 Hz (see 7.2.7).
Caution! fdmax is an internal scaling value. Therefore, larger changes via the
LECOMinterface, may only be done when the controlleris inhibited.
Lenze
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