Datalogic ENC-58 PROG, Инструкция по эксплуатации, Страница: 17 / 38

ENC58 PROG
12
4.11 Index pulse setting external button (Figure 1)
This encoder provides the zero signal (Index pulse) once per
revolution as relative positioning reference (home position, see the
Figure on page 9).
In this way a unique position can be identified at a well-known point
in the 360° revolution of the encoder shaft. The external button
located in the rear side of the encoder enclosure allows to set the
point in the revolution at which the 0 pulse will be output. This
function is useful, for example, when you want the zero position of
the encoder and the zero mechanical position of the axis to match.
When you want to set the position of the 0 signal in the revolution
you must move the axis to the desired position, then press the Index
pulse setting button while the encoder and the mechanical assembly
are in stop.
WARNING
Please do not press the Index pulse setting external button when the
encoder configuration interface program is running.
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 sending a
signal via PLC or other controller through the dedicated input -see
the section “4.8 Index pulse setting input” on page 9-; or by pressing
the PRESET button available in the programming interface -see the
Preset parameter on page 20.