Map I/O behavior when PC loses power?

Hi all

I'm working on an existing Labview application that uses a number of fieldpoint i/o modules.  IO modules measure voltages and currents on a system of current alternative and contactors etc. nearby.  I am worried about what happens when you run a Labview program and the PC loses power?  The outputs go to a defined or random State?

If a PC using modules e/s always being on a UPS?

Thanks for any clarification,

Sean

Using a controller of fieldpoint or fieldpoint network module?

You ask about knowing if a PC loses power.  But your concern on when the network module or controller loses power?

If your PC loses power, but not the network/controller module, then all output should stay at their last good value.  Basically, you have removed any communication providing updated data.

If the network/controller module loses power, then all modules IO would lose power.  But if the power comes back, then modules e/s would go to their default start state until the PC would communicate a new value for them.

You should also watch the watchdog functions.  I know a controller fieldpoint has them, but I have not worked with a network module.

Like Thoric said, it is essential for safety, then the PC and/or fieldpoint controller/module must be saved with an inverter.  Factor in the code so that it can detect the loss of power and set all values and exits in your system settings of security before the UPS battery would die.

Tags: NI Software

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