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National Instruments Corporation
3-1
3
Feature Set Description
This chapter describes the feature set for the FP-1000 and FP-1001 network
modules.
High-Speed Local Bus
The FP-1000/1001 provides a high-speed local bus for communication to
the I/O modules in the bank. The high-speed local bus has low overhead
that enables fast response to commands from the host computer.
Network Watchdog Timer
The FP-1000/1001 can detect unexpected periods of network inactivity and
respond to them in a user-defined way. The network watchdog timer
feature enables you to guard your system against failures in the network
connection, cables, or host computer, and to put the channel outputs in a
user-defined state (the watchdog state) if such failures do occur.
You can set the watchdog output values to be different from the power-up
output values. Some system applications do not differentiate between
power-up output values and watchdog output values, while other
applications treat the two conditions differently. The FP-1000/1001
supports both types of applications.
By default, the watchdog timer for the bank is disabled on power up. To use
the watchdog timer, set up the following parameters. You can use either the
FieldPoint Explorer software or the FieldPoint command set.
•
Watchdog data value for each channel
•
Watchdog data enable/disable status for each channel
•
Watchdog enabled/disabled status for each I/O module
•
Watchdog timeout value for the bank
Note
Each bank has only one watchdog timeout value that is common for all the modules
in that bank. In addition, the current watchdog timeout value is not stored when you store
the SnapShot.