Hioki PW3390 - Detecting the Motor Rotation Direction

4.8 Viewing Motor Measurement Values (Model PW3390-03 only)
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Chapter 4 Viewing Measurement Values
When the A phase pulse and the B phase pulse of the incremental-type rotary encoder are input in the
CH B and CH Z rotation signal input jacks, the rotation direction of the axis can be detected and polar
code can be assigned to the number of rotations.
When the setting [B Phase] for CH Z input is selected, the rotation direction is detected.
Rotation direction is determined by another directional level (High/Low) in the detection timing of rise/fall
of A Phase pulse and B Phase pulse.
The rotation direction detected is assigned as a polar code to the measurement value of the number of
rotations, and also reflected in the motor power [Pm] measurement value.
4.8.3 Detecting the Motor Rotation Direction
Rotation direction detection and acquisition of original signal (Z Phase pulse) cannot be per-
formed simultaneously.
Use the original signal (Z Phase pulse) when measuring the motor electrical angle using multi-
ple pulses.
A Phase
B Phase
Normal rotation
Polar code for number of
rotation is +
Counter rotation
Polar code for number of
rotation is -
A Phase
B Phase