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Switch Settings
Switch S1
The dedicated output circuits (Amp Enable & In Position) of the OptoCon have pull-down
resistors on their inputs that prevent unwanted output transitions during a motion controller
reset or power-up sequence. Refer to the
Output Circuit
figure on page F-8. To disable the
pull-down resistors, use switch S1.
If either of the Amp Enable outputs are configured as
Active Low
, the appropriate pull-down
resistor should be disabled (as indicated in the next table). To configure the Amp Enables for
Active High
or
Active Low
operation, use the MEI library function
set_boot_amp_enable_level(...)
.
Note
The
Amp Enable pull-down resistors
should only be enabled
when the Amp En-
ables are configured as
Active High
on the motion controller.
Note
The pull-down resistors for the
In Position
outputs
should always be enabled
,
because the the
In Position
outputs are always
Active High.
Table F-1
Switch S1 Settings (To enable/disable pull-down resistors)
Position
Setting
Signal
Pull-Down Resistor is
Switch S1
1
On
Amp Enable(0/2)
Enabled
1
Off
Amp Enable(0/2)
Disabled
2
On
In Position(0/2)
Enabled
2
Off
In Position(0/2)
Disabled
3
On
Amp Enable(1/3)
Enabled
3
Off
Amp Enable(1/3)
Disabled
4
On
In Position(1/3)
Enabled
4
Off
In Position(1/3)
Disabled
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