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462
Figure 2.1.3: Current and Reduction Adustment Resistor Connection
D i s a b l i n g t h e D r i v e r O u t p u t s ( E N O N M o d e )
The second method is to disable the driver outputs. In this configuration the driver
outputs will disable 0.5 seconds after the following edge of the last step clock
pulse. This would be the preferred method if zero holding current is required.
To set this mode, reposition the shunt on JP3 to pins 2 and 3. Ensure that a current
reduction adjust resistor is not connected, as this will cause erratic operation.
WARNING!
When using the
ENON
mode of disabling
the outputs following a move, the current reduction
resistor
MUST NOT
be used or the driver will operate
erratically!
Current Reduction Adust
Resistor (See Equation A.1)
Output Current Adjustment
Resistor (See Table A.4)
Ensure that the current
and reduction adjustment
resistors are placed as close
as possible to the INT-462
to reduce coupled noise!
ENOFF/ENON
ENOFF/ENON
If a reduction adjustment
resistor is used,
as shown below .
pins 1 and 2
(ENOFF) on JP3 must be
jumped
PIN 1