Newall DP8 - Page 40

Auxiliary Output Option
Newall Measurement Systems
8.13 Inputs
There is one input which may be used to reset the position pulse output function. This input is grounded to
cause a reset. e.g. a switch or relay contact may be used.
8.14 Operation
There are two modes of operation; single axis or all axis.
(a) Single Axis Operation
Each one of the three outputs corresponds to a set position, position 1, 2 or 3, on one axis only. As that axis
passes through each of the set positions then the corresponding output will change from it’s normally ON
state to OFF. The direction of travel must be in the negative direction and each output will change just once
and stay OFF until reset. The outputs may be reset in one of three different ways;
i) by pressing the [ENT] key
ii) by means of the external input
iii) by returning the axis past a preset “reset” position.
Figure 8.3 illustrates single axis operation.
This mode of operation enables the DP8 to be easily connected to relays or a PLC for control on one axis.
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AUXILIARY OUTPUT OPTION
OUTPUT 1
OUTPUT 2
OUTPUT 3
RESET
POSITION 1 POSITION 2 POSITION 3
OFF
ON
OFF
ON
OFF
ON
Figure 8.3 Pulse Position Output (Single Axis)
(b) All Axis Operation
Each of the three outputs corresponds to one axis only. Three positions together with a reset position can
be set for each axis. As an axis passes through the first two set positions a pulse will occur on the output for
that axis. As the third position is reached then the output will change state to OFF and stay in that condition
until a reset occurs. The reset methods are as for single axis operation. As with single axis operation the
direction of travel must be negative, therefore the first and second positions must be set at more positive
values than the third. Figure 8.4 illustrates all axis operation.
The width of the output pulses may be set from 2ms up to 120ms.
In this mode of operation the DP8 may be easily connected to a PLC for control of one, two or three axes.
AXES
POSITION
X
POSITIVE DIRECTION
NEGATIVE DIRECTION