Parameter 04.002 Torque Producing Current
Short description Shows the instantaneous level of torque producing current
Mode Open‑Loop
Minimum −VM_DRIVE_CURRENT Maximum VM_DRIVE_CURRENT
Default Units A
Type 32 Bit Volatile Update Rate 250µs write
Display Format Standard Decimal Places 3
Coding RO, FI, VM, ND, NC, PT
Iq, Torque Producing Current (04.002) is the instantaneous level of torque producing current scaled so that it represents the r.m.s. level of current under
steady state conditions. Iq, Torque Producing Current (04.002) is proportional to the torque produced by the motor provided field weakening is not
active. For field weakening operation the Iq, Torque Producing Current (04.002) is boosted for a given level of torque to compensate for the reduction in
the motor flux.
Sign of Iq,
Torque Producing Current
(04.002)
Sign of frequency
or speed
Direction of
motor torque
+ + Accelerating
- + Decelerating
+ - Decelerating
- - Accelerating
Parameter 04.003 Final Torque Reference
Short description Shows the final torque reference
Mode Open‑Loop
Minimum −VM_TORQUE_CURRENT Maximum VM_TORQUE_CURRENT
Default Units %
Type 16 Bit Volatile Update Rate 250µs read
Display Format Standard Decimal Places 1
Coding RO, FI, VM, ND, NC, PT
The Final Torque Reference (04.003) is the sum of the Torque Reference (04.008), and Torque Offset (04.009) if enabled, as a percentage of rated
motor torque.
Parameter 04.004 Final Current Reference
Short description Shows the final current reference after the current limits
Mode Open‑Loop
Minimum −VM_TORQUE_CURRENT Maximum VM_TORQUE_CURRENT
Default Units %
Type 16 Bit Volatile Update Rate 250µs write
Display Format Standard Decimal Places 1
Coding RO, FI, VM, ND, NC, PT
The Final Torque Reference (04.003) is converted into the Final Current Reference (04.004) by applying a torque to current conversion and by applying
the Final Current Limit (04.018). The torque to current conversion is applied as follows:
|Output Frequency (05.001)| ≤ Rated Frequency (05.006)
Current reference = Final Torque Reference (04.003)
|Output Frequency (05.001)| > Rated Frequency (05.006)
Current reference = Final Torque Reference (04.003) x Rated Frequency (05.006) / Output Frequency (05.001)
Parameter 04.005 Motoring Current Limit
Short description Defines the current limit used when the motor is being accelerated away from standstill
Mode Open‑Loop
Minimum −VM_MOTOR1_CURRENT_LIMIT Maximum VM_MOTOR1_CURRENT_LIMIT
Default 0.0 Units %
Type 16 Bit User Save Update Rate 4ms read
Display Format Standard Decimal Places 1
Coding RW, VM, RA
The Motoring Current Limit (04.005) limits the current when the motor is being accelerated away from standstill. The Regenerating Current Limit
(04.006) limits the current when the motor is being decelerated towards standstill. If the Symmetrical Current Limit (04.007) is below the
Motoring Current Limit (04.005) then it is used instead of the Motoring Current Limit (04.005). If the Symmetrical Current Limit (04.007) is below the
Regenerating Current Limit (04.006) then it is used instead of the Regenerating Current Limit (04.006).
The maximum possible current limit (VM_MOTOR1_CURRENT_LIMIT [MAX]) varies between drive sizes with default parameters loaded. For some
drive sizes the default value may be reduced below the value given by the parameter range limiting.
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