Pu21003b_oi_e.doc / Apr-16
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4.3.
Definition of the direction of rotation
The unit is designed to evaluate quadrature direction information (A/B, 2x90°) and static
direction information as well. Furthermore it can convert the direction information from one
format to the respective other format. Positions 3, 4 and 5 of switch DIL2 provide individual
selection for input and output.
0=OFF
1=ON
DIL2
8 7 6 5 4 3 2 1
0 0 1
A
B
Input: static direction
A
B
T
Output: quadrature direction
0 1 0
A
B
Input: quadrature direction
A
B
Output: static direction
1 0 0
Output format = input format
4.4.
Phase displacement A/B
These settings are only relevant with single channel input signals (input A alone or A with B as
a static direction information), when this information needs to be converted into a quadrature
A/B format at the output.
In this case the unit will generate a time-constant phase displacement “T”. This displacement
can of course correspond to 90° at a specific frequency only, which however will not be a
disadvantage with most of the target units available on the market. Please select the time of
A/B displacement according to the maximum frequency indications given in the setting table.
Displacement times will add up when several positions are switched on at the same time.
0=OFF
1=ON
DIL1
8 7 6 5 4 3 2 1
1
T = +22us (12 kHz)
Time displacement A/B
1
T = +5us (50 kHz)
0=OFF
1=ON
DIL2
8 7 6 5 4 3 2 1
1 T = +2.5us (100 kHz)
Time displacement A/B
1 T = +1us (250 kHz)
