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National Instruments Corporation
9
MID-7654/7652 Servo Power Motor Drive User Guide
Inhibit Input Polarity Setting
Use DIP switch 1 on the 4-position DIP switch bank to globally set the polarity for the inhibit input for
all axes. Refer to Figures 1 and 3 for the location of this switch.
The factory-default setting of DIP switch 1 is active-low. If the inhibit input is active, the axis is inhibited
and the yellow status LED (middle row) corresponding to that axis illuminates. Table 2 shows the DIP
switch setting for the inhibit input polarity selection.
Inhibit Output Polarity Setting
Use DIP switch 2 on the 4-position DIP switch bank to globally set the polarity for the inhibit output for
all axes. Refer to Figures 1 and 3 for the location of this switch.
The factory-default setting of DIP switch 2 is active-high. Table 3 shows the DIP switch setting for the
inhibit output polarity selection.
Limit Status LED Polarity Setting
Use DIP switch 3 on the 4-position DIP switch bank to globally set the polarity for the Limit Status
LED. Refer to Figures 1 and 3 for the location of this switch.
The factory-default setting is active-high. Typically, you set the switch to match the polarity setting on
your controller, so if either the reverse or forward limits for an axis are active, the green status LED (on
the bottom row) corresponding to that axis illuminates. This DIP switch alters only the polarity for the
LEDs, not the actual limit to the motion controller. Table 4 shows the DIP switch setting for the Limit
Status LED polarity selection.
Table 2.
Inhibit Input Polarity DIP Switch Settings
Switch Setting
Operation
Active-high
Active-low
(factory default)
Table 3.
Inhibit Output Polarity DIP Switch Settings
Switch Setting
Operation
Active-high
(factory default)
Active-low
1
O
N
1
O
N
3
O
N
3
O
N
