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Menu 4
Digitax ST Advanced User Guide 77
Issue Number: 1 www.controltechniques.com
See Pr 4.16 on page 75.
This parameter displays the actual torque producing current (Pr 4.02) as a percentage of rated active current. Positive values indicate motoring and
negative values indicate regenerating.
If this parameter is set to one, the drive calculates a torque reference from the motor and load inertia (Pr 3.18) and the rate of change of speed
reference. The torque reference is added to the speed controller output to provide inertia compensation. This can be used in speed control
applications to produce the torque required to accelerate or decelerate the load inertia.
The current demand filter time constant is defined by this parameter if the speed gain select (Pr 3.16) is one.
The maximum for Pr 4.08 and Pr 4.20 is defined by this parameter
See Pr 4.16 on page 75.
4.19 Overload accumulator
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 1 1
Range 0 to 100.0 %
Update rate Background write
4.20 Percentage load
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111111
Range ±USER_CURRENT_MAX %
Update rate Background write
4.22 Inertia compensation enable
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background read
4.23 Current demand filter 2
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Range 0.0 to 25.0 ms
Default 0.0
Update rate Background read
4.24 User current maximum scaling
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 111
Range 0.0 to TORQUE_PROD_CURRENT_MAX %
Default 300
Update rate Background read
4.25 Low speed thermal protection mode
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background read
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