Mitsubishi 700 Series

PROTOCOL-SPECIFIC INFORMATION
122
The RPM-to-Hz conversion equation is [RPM x number of motor poles / 120]. Table 32 indicates the
scenarios under which the conversion equation is and is not applied, and the value used for the “number
of motor poles” component in the numerator of the conversion equation. 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. Note that the values of Pr. 37 and Pr. 144 are read by the interface card only at
boot-up, so if these parameter values are changed, then the interface card must be rebooted in order for
it to recognize the new values and once again determine the required conversion scenarios.
Table 32: Inverter Speed Reference and Speed Actual Conversion Scenarios
Pr. 37 Pr. 144
Conversion
Applied?
Number of Motor Poles Used in
Conversion Equation
0
(default
value)
0
Yes
4
2..10
Yes
2..10
102..110
No
N/A
1..9998
0
Yes
4
2..10
No
N/A
102..110
Yes
2..10