National Instruments NI 9512 User Manual - page 28
2-16
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Chapter 2
Hardware Overview
Encoder Active
The Encoder Active LED (green) has three states for encoder and V
sup
status.
•
Off
—The power supply (V
sup
) is not connected. You must connect a power supply to
receive encoder pulses.
•
Flashing
—The power supply (V
sup
) is connected and the module is receiving encoder
pulses.
Note
The LED flash rate does not correspond to the rate at which the module
receives encoder pulses. For the NI 9516 module, the encoder LED flashes when
pulses are received on either Encoder 0 or Encoder 1.
•
Lit
—The power supply (V
sup
) is connected but the module is not receiving encoder pulses.
Limit Active
The Limit Active LED (yellow) has two states to display the status of the limits and home input.
•
Off
—The power supply (V
sup
) is not connected, or both the limits and home input are not
active.
•
Lit
—The power supply (V
sup
) is connected and the forward limit, reverse limit, or home
input is active.
Axis Fault
The Axis Fault LED (red) has two states to indicate the presence of a fault in the system. Refer
to the
NI SoftMotion Module
book of the
LabVIEW Help
for a list of module faults and
troubleshooting information.
•
Off
—No module faults.
•
Lit
—One or more module faults.