PROTOCOL-SPECIFIC INFORMATION
PolesMotor
ofNumber
120x Frequency Max
RPMMax =
Equation 4
0x4000
Frequency
Max NSOLL_A x
Hz =
Equation 5
FrequencyMax
0x4000 x Hz
NIST_A =
Equation 6
0x4000
RPMMax NSOLL_A x
RPM =
Equation 7
RPMMax
0x4000 x RPM
NIST_A =
Equation 8
NSOLL_A: The reference speed setpoint is a normalized value. The interface card applies the
Normalize-to-Hz or Normalize-to-RPM conversion indicated by Equation 5 or Equation 7 respectively.
The resulting value is written to inverter register 2 (frequency command).
NIST_A: The inverter operating actual speed is a normalized value that is calculated from inverter
register 201 (output frequency). The interface card applies the Hz-to-Normalize or RPM-to-Normalize
conversion indicated by Equation 6 or Equation 8 respectively.