topic Re: detecting fieldpoint device errors in FieldPoint Family

detecting fieldpoint device errors

Chris IDS — Wed, 04 Sep 2002 11:58:28 GMT

Hello group.

I am getting started with Fieldpoint. I have a FP1600, FPRLY422 and a FPAI110 device connected to my PC. I'm using Delphi (with the DataSocket control, OPC, etc) to control / read from these FP devices, but I am having problems detecting when errors have occurred. I would like to be able to detect such things as a broken network cable, devices have lost power, someone has unplugged a device from the rack, etc. If I disconnect the FPRLY422, no errors are detected until I try to write a value to the FPRLY422 module, and I get "Active: Can't write data". Much better error handling is required..! Anyone know how ?

Many thanks,

Chris

Re: detecting fieldpoint device errors

Joji — Thu, 05 Sep 2002 16:03:23 GMT

Suggestion accepted. Thank you for choosing National Instruments products.

You could periodically read from each IO Module. The status code will give you an error code timeout/module not found/out of range, etc. which would essentially be a kind of status check. This would add much overhead since the FieldPoint Ethernet is always updated asynchronously.

Re: detecting fieldpoint device errors

Joji — Thu, 05 Sep 2002 16:04:22 GMT

The last sentence should read
" This would NOT add much overhead since the FieldPoint Ethernet is always updated asynchronously"

Sorry