Feature Descriptions; Guarding Against Network Failures (Network Watchdog); Guarding Against Other System Failures (Hardware Watchdog) - National Instruments Compact FieldPoint cFP-21 Series User Manual

Feature Descriptions

Guarding against Network Failures (Network Watchdog)

Note National Instruments recommends leaving the network watchdog disabled when
you are running embedded applications on the cFP-21xx. Refer to the section of this
chapter for information about the hardware watchdog for embedded applications.
Guarding against Other System Failures
(Hardware Watchdog)
© National Instruments Corporation
The network watchdog feature of the cFP-21xx 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-21xx loses communication
with all hosts or clients over the network, the cFP-21xx sets output channels
to predefined values (the watchdog state). The network watchdog is
disabled by default.
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.
In addition to the network watchdog, the cFP-21xx 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.
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cFP-21xx and cFP-BP-x User Manual