©
National Instruments Corporation
3-1
cFP-21xx and cFP-BP-x User Manual
3
Feature Descriptions
Guarding against Network Failures (Network Watchdog)
The network watchdog feature of the cFP-21
xx
enables you to guard your
system against failures in the network connection, cables, or host computer.
If the network watchdog is enabled and the cFP-21
xx
loses communication
with all hosts or clients over the network, the cFP-21
xx
sets output channels
to predefined values (the watchdog state). The network watchdog is
disabled by default.
Note
National Instruments recommends leaving the network watchdog disabled when
you are running embedded applications on the cFP-21
xx
. Refer to the section of this
chapter for information about the hardware watchdog for embedded applications.
Network watchdog output values can be different than power-up output
values. For example, you may want to turn an output value on when you
power up, but turn it off if network communication is lost.
Refer to the
Measurement & Automation Explorer Help for FieldPoint
for
information about enabling and configuring the network watchdog.
Guarding against Other System Failures
(Hardware Watchdog)
In addition to the network watchdog, the cFP-21
xx
controller supports a
hardware watchdog that you can set up in LabVIEW Real-Time. The
hardware watchdog enables the controller to respond in predetermined
ways to failures in the system. The VIs to control the hardware watchdog
are on the LabVIEW Real-Time palette.
