Lenze PositionServo 940, Руководство пользователя

Страница: 41 / 68

S94P01B
39
6.3.14 Regen duty cycle
This parameter sets the maximum duty cycle for the brake (regen) resistor. This
parameter can be used to prevent brake resistor overload. Use the following formula
to set the correct value for this parameter.
D = P * R / (Umax)
2
* 100%
where:
D (%)
regen duty cycle
Umax (V) bus voltage at regen conditions.
Umax=390V for 230VAC drives and 770V for 400/480VAC drives
R (ohm) regen resistor value
P (W) regen resistor rated power
Note
If calculation of D is greater than 100% set it to 100% value. If
calculation of D is less than 10% then resistor power rating is too low.
Refer to section 5.1.6 for details on braking resistor selection.
6.3.15 Encoder repeat source
This parameter sets the feedback source signal for the buffered encoder repeat
outputs (P3.1-6). The source can be the drive’s encoder input (P4) or an optional
feedback module (resolver, second encoder etc.)
6.3.16 System to master ratio
This parameter is used to set the scale between the reference pulse train (when
operating in position mode) and the system feedback device. In a single loop
configuration, the system feedback device is the motor encoder or resolver. In a dual-
loop system the system encoder is the second encoder. See sections 8.3 and 8.4 for
details.
6.3.17 Second to prime encoder ratio
This parameter sets the ratio between the secondary encoder and the primary
feedback device when the drive is configured to operate in dual-loop mode. When
the primary feedback device is a resolver, the pulse count is fixed at 65,536. The
resolutions of encoders are “post quadrature” (PPR x 4). See section 8.4
Note
Post quadrature pulse count is four times the pulses-per-revolution
(PPR) of the encoder.
6.3.18 Autoboot
When set to “Enabled” the drive will start to execute the user’s program immediately
after cold boot (reset). Otherwise the user program has to be started from MotionView
or from the Host interface.
6.3.19 Group ID
See Programmer’s manual for details. This parameter is only needed for operations
over Ethernet network.