User-Configurable Leds A-D; Power-On Self Test (Post) - National Instruments Compact FieldPoint cFP-21 Series User Manual

Chapter 3 Feature Descriptions
100 Mbps LED
User-Configurable LEDs A–D

Power-On Self Test (POST)

cFP-21xx and cFP-BP-x User Manual
The green 100 Mbps LED is lit when the cFP-21xx is communicating
at 100 megabits per second. If the 100 Mbps LED is not lit, the cFP-21xx
is communicating at 10 megabits per second.
LEDs B, C, and D can be sent values of 0, 1, or 2. LED A should be sent
only 0 or 1. LED A handles a 2 as a 1. The values sent to these LEDs
manifest as 0 = off, 1 = green, and 2 = red.
The cFP-21xx runs a power-on self test (POST) at power-up to verify its
operational status. The test takes several seconds, does not affect the
operation of the network, and does not affect any of the field wiring on
connector blocks installed on the backplane.
If the power-on self test fails, the cFP-21xx does not participate in network
communication, eliminating potential conflicts with other controllers on
the network.
When you power up the cFP-21xx and it has already been configured for
use, the POWER and STATUS LEDs turn on for about five seconds, then
the STATUS LED turns off. When the I/O module READY LEDs turn on,
the controller is ready for use.
The cFP-21xx indicates POST failure through the STATUS LED. If the
LEDs do not follow the sequence described here, refer to the
Error Indications section of Appendix A, Troubleshooting, for information
about possible reasons.
3-4
STATUS LED
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