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Getting Started with NI 9512 and P7000 Drives
Current Reduction
Current reduction reduces drive and motor heating by invoking standby current reduction. When
enabled, current reduction cuts motor current to 75 percent of its commanded value 100 ms after
receipt of the last step pulse. You can adjust the reduction proportion and delay to other values
using the P7000 Tools configuration software.
When current reduction is enabled, the motor holding torque is reduced. Do not enable it for
applications that require full holding torque when the motor is stationary.
Table 9 lists the current reduction DIP switch settings.
Note
Current reduction is
enabled
when switch S2–10 is OFF.
Multistepping
Multistepping is similar to dynamic smoothing, except it is a much more aggressive use of the
filter. Typically, it results in a filter that begins to roll off two octaves below the resonant frequency.
This is intended for use with coarse resolution (full/half-step input pulses) to smooth large steps
into a continuous train of microsteps, and may provide smoother motion depending on your motion
application. Disable multistepping if you are not using full or half step resolution.
Table 10 lists the multistepping switch settings.
Table 9.
Current Reduction DIP Switch Settings
Current Reduction
S2–10
Enabled
OFF
Disabled
ON
Table 10.
Multistepping DIP Switch Settings
Multistepping
S2–11
Enabled
ON
Disabled
OFF
10
O
F
F
10
O
N
11
O
N
11
O
F
F
