Logos for communication between Fieldpoint modules?

[Richard2950]

I have a system with two Fieldpoint network modules: one FP2000 and one FP1601. I am presently using datasocket calls using the lookout protocol for the FP2000 to read/write the I/O items on the FP1600. There is normally no PC connected to the two. Our NI salesperson visited today and told me that the recommended means of communication between Fieldpoint network modules is using Logos. He also mentioned using the "FieldPoint Publish Data" vi. I searched all the documentation I have and can't find anything on Logos, or any way to make any sense out of what he said. Can someone please tell me exactly what he meant and how I would implement it? I have LabView RT and FieldPoint Explorer, but no other software.

[Aaron_G]

Richard,

Logos is the name for the NI Ethernet Protocol. It was originally developed for networking of computers using Lookout. Using DataSocket with the Lookout URL specifier, is instructing the DataSocket client to use the logos protocol or lookout protocol (the terms are interchangeable). The FieldPoint Publish Data.vi is a VI that can be run on embedded targets (e.g. (c)FP-20xx series) that can be used to make data available via the NI Ethernet protocol. For example, if you measured two sensors and calculated a value from the two sensors, you could use the Publish Data.vi to make the calculation result available from the FP-2000.

Regards,
Aaron

[GregD]

For LabVIew 7.1 look at the NI Measurements>Fieldpoint>Datasocket> Network Read.vi internals

Be aware, I have found through testing that in roughly takes 500msec for a FP controller to read a single remote FP1601 module IO point.

GD