Datalogic ENC-58 PROG, Instruction Manual, Page: 15 / 38

ENC58 PROG
10
WARNING
Please check the position of the 0 pulse and set it if necessary
whenever you set a new resolution next to the Resolution parameter
or reverse the counting direction.
NOTE
The width of the 0 pulse can be set next to the Z pulse width
parameter.
Two options are available: 90° and 180°.
Please note that the 0 pulse having a width of 90 electrical degrees
is synchronised with A and B pulses, while the 0 pulse having a width
of 180 electrical degrees is synchronised with A pulse.
For further information please refer to page 20.
NOTE
It is possible to set the 0 pulse position also by either pressing the
external button located in the rear side of the encoder enclosure -see
the section “ 4.11 Index pulse setting external button (Figure 1)” on
page 12-; or by pressing the PRESET button available in the
programming interface -see the Preset parameter on page 23.
4.9 Counting direction input
By default the phase relationship between A and B channels is so
that the rising edge of A channel leads the rising edge of B channel
when the encoder is rotating in a clockwise direction (see the Figure
in the previous page).
Thus the counter in the subsequent electronics will get a count up.
This input allows to have a count up also when the encoder is
rotating in a counter-clockwise direction (otherwise a count down
when the encoder is rotating in a clockwise direction). Connect the
Counting direction input to 0VDC if not used. Connect the Counting
direction input to 0VDC to have an increasing count when the
encoder is turning clockwise; connect the Counting direction input to
+VDC to have an increasing count when the encoder is turning
counter-clockwise. Clockwise and counter-clockwise directions are
viewed from the shaft side.
WARNING
The counting direction can be set also through the programming tool.
The Direction parameter implies that the Counting direction input is
set to 0VDC. Otherwise the resulting will be contrary to what is
expected or intended. The Direction parameter allows the operator to
choose between the options UP and DOWN. When the counting
direction is set to UP -Direction = UP-, if the Counting direction input
has LOW logic level (0VDC) the encoder will provide the increasing
count when the shaft is turning clockwise (and the decreasing count
when the shaft is turning counter-clockwise); on the contrary if the
counting direction input has HIGH logic level (+VDC) the encoder will
provide the increasing count when the shaft is turning counter-