LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

Field Point and GE PLC Data Acquisition Timing out of sink

I am currently passing variables to and from Field Ponit and GE's PAC RX3i. The data response time from the PLC to LabView is slow and erratic (out of sink) causing question marks when anyalizing data. Is there a way to get consistant timing between the two devices

0 Kudos
Message 1 of 4
(1,355 Views)

Pranft-

 

In order to communicate between those two devices in LabVIEW in a less erratic sense would be to use the serial interface from the FP to the GE PAC RX3i, which can be easily accomplished by using the VISA protocol which I recommended, as long as you know how to format the commands. It appears, to me, that you can format a COMMREQ command and send it as an SNP command, or you can set the device to Serial I/O and communicate using lower level serial commands.

 

You may want to look into OPC server software. But because this is a 3rd party hardware Im afraid I do not know exactly how to do this. I hope this helps 🙂 

Sam S
Applications Engineer
National Instruments
0 Kudos
Message 2 of 4
(1,346 Views)

I am using OPC server software, with ethernet connection

0 Kudos
Message 3 of 4
(1,340 Views)

pranft

 

The data should be being passed as quickly as the overhead allows. Because that is 3rd party hardware Im not sure exactly how it works but using the OPC serve software with ethernet leads its self to using datasockets or shared variables:

 

http://zone.ni.com/devzone/cda/tut/p/id/3543  it may be similar to using FieldPoint 

http://zone.ni.com/devzone/cda/tut/p/id/4679

 

http://decibel.ni.com/content/docs/DOC-4065

 

These are some of the places I would look to begin with 🙂

Sam S
Applications Engineer
National Instruments
0 Kudos
Message 4 of 4
(1,332 Views)