6 — COMMISSIONING
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022 Return to TOC
pg. 164
3.5 Motors using the Hall-eect switch position sensor.
Support for Hall eect position sensor feedback has been added on all controller models. is
option may only be used with PMSM motors.
To use this feedback, select type 4 (Hall Switch) for Feedback_Type (0x3520). Commissioning
is required to use this new sensor type as the commutation sequence, positions, and hysteresis
need to be measured.
e values of the following parameters will be established during commissioning and need to
be set as the project defaults for volume production application soware releases:
Switch_Hall_Calibrated_Position_0 (0x50A0)
Switch_Hall_Calibrated_Position_1 (0x50A1)
Switch_Hall_Calibrated_Position_2 (0x50A2)
Switch_Hall_Calibrated_Position_3 (0x50A3)
Switch_Hall_Calibrated_Position_4 (0x50A4)
Switch_Hall_Calibrated_Position_5 (0x50A5)
Switch_Hall_Pattern_0 (0x50A6)
Switch_Hall_Pattern_1 (0x50A7)
Switch_Hall_Pattern_2 (0x50A8)
Switch_Hall_Pattern_3 (0x50A9)
Switch_Hall_Pattern_4 (0x50AA)
Switch_Hall_Pattern_5 (0x50AB)
Switch_Hall_Hysteresis (0x32D1)
e following variables can be used to monitor/diagnose the status of the Hall sensors:
Switch_Hall_Pattern (0x32A2)
It is not recommended to use Hall switches for systems that need signicant eld weakening
(operation past base speed).
Unfortunately, it is dicult to determine how much eld weakening is problematic, as it's
highly dependent on the motor and system design.
e Hall switch control uses the same Field Orientation as other position sensor feedback
types and, therefore, produces sinusoidal control. is is in contrast to a trapezoidal drive
(e.g. 1226BL).
When using Hall switches, it is expected that very low speed control gains will be necessary
at low speeds.
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