17 Screen page "Current"
Use the default values for the motor. Please do not make any alterations to the settings for the current controller
unless they have been discussed with our applications department.
Cycle time of the current controller: 62.5 µs
Irms
ASCII: ICONT
Default: 50% rated current valid for all OPMODES
Sets the rated output current that is required. The adjustment is usually made to I
0
, the standstill current for the
motor that is connected. The value that can be entered is limited to the rated current of the amplifier or the
standstill current of the motor Io (the lower of the two values). The function is used in the monitoring of the
actual r.m.s. current that is drawn. The limit that is set by the Irms-setting reacts after approx. T
I2t
= 5 sec at
maximum load. The calculations for current settings other than the rated values are made according to the
equation:
T
I2T
=
I²rms * 15s
I²peak - I²rms
Ipeak
ASCII: IPEAK
Default: 50% peak current valid for all OPMODES
Sets the required pulse current (r.m.s. value). The value that can be entered is limited to the rated peak current
of the motor or amplifier (the lower of the two values).
Ref.-Ipeak
ASCII : REFIP
Default : 50% peak current Valid for all OPMODES
This sets the required pulse current (r.m.s. value) for Homing 7 (homing to the hardware stop, with zero-mark
detection) and for "Wake & Shake" commutation with external encoder systems. The entry is limited by the
lower value of the peak currents for the amplifier and motor.
I²t message
ASCII: I2TLIM
Default: 80 % valid for all OPMODES
Sets the level, as a percentage value of the r.m.s. current, above which a message will be sent to one of the
programmable outputs DIGITAL-OUT1/2 (X3/16 or X3/17). A warning appears in the display.
KP
ASCII: MLGQ
Default: 1 valid for all OPMODES
Determines the proportional gain of the current controller.
Normalization: at KP=1 and at a control deviation I_cmd -I_act = peak armature current
the rated motor voltage will be output.
Tn
ASCII: KTN
Default: 0,6 ms valid for all OPMODES
Determines the integral-action time (integration time constant) of the current controller.
52 Setup Software
Screen page "Current" 07/03 BECKHOFF
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