Mitsubishi 700 Series

PROTOCOL-SPECIFIC INFORMATION
236
9.9.5.3 PROFIdrive Reference Speed Setpoint and Actual Speed
The speed setpoint value, NSOLL_A, is the commanded speed reference (normalized) sent from the
controller to the inverter. Similarly, the speed actual value, NIST_A, is the actual operating speed
(normalized) of the inverter sent back to the controller. As the inverter natively operates in units of Hz or
RPM depending on certain combinations of Pr. 37 and Pr. 144, the interface card must apply conversion
equations to and from the normalized values. Refer to Table 56 to determine the appropriate conversion
equations. For more information on the manners in which Pr. 37 and Pr. 144 affect the inverter’s
operation, please refer to the appropriate inverter user’s manual.
Table 56: Inverter Speed Setpoint and Speed Actual Conversion Scenarios
Pr. 37 Pr. 144
Inverter
Unit
Number of
Motor Poles
NSOLL_A
Conversion
NIST_A
Conversion
0
(default
value)
0, 2..10
Hz
N/A
Equation 5
Equation 6
102..110 RPM 2..10 Equation 7 Equation 8
1..9998
0, 102..110
Hz
N/A
Equation 5
Equation 6
2..10
RPM
2..10
Equation 7
Equation 8
The “Max Frequency” equates to the value of Pr. 1 (register 1001, maximum frequency).