How can I change Fieldpoint input ranges programatically?

[Rainer Ehrt]

Hi everybody,
I'm using several FP-AI-110 (8ch AI module) and FP-SG-140 (8CH strain
gauge module) with FP-1001 as RS-485 communication device, driven by
LabVIEW.

Now I need to implement a autoranging feature, to adapt the channel
input ranges to track the input voltages for best possible resolutions.
Since there are no VIs to do this, I guess I have to use the Extended
FieldPoint Command Descriptions for >>Set Attributes<< and >>Get
Attributes<<, described in Fieldpoint Programmers Reference Manual.
I looked there and found settings for all kinds of FielPoint modules,
but not for the FP-SG-140, which is most important for me. I also did
not find a more recent manual on the NI-site, which contains the
nessesary d
escriptions.

Questions:
#1.
Has anybody done this before for any modules and can give me some hints
(or VIs)?
#2.
Is there a way to use the VIs, supplied with the fieldpoint software. I
guess they are for use with ethernet-fieldpoints, because they need a
IP-adress.

Bye,
Rainer

[Aaron_G]

Rainer,

1) You can do this using the Optomux VI's which are located at: ftp://ftp.ni.com/support/fieldpoint/LVFPOpto/

Please note, that after changing the range of a channel, you must wait for a period of time that is greater than or equal to the All Channel Update rate of the module prior to reading the channel that you just changed the range on. This is necessary to avoid scaling data acquired on the old range setting with the scale of the new range.

2) The configuration VI's are ethernet based and do not work with serial modules. Instead, you should use the FieldPoint Optomux VI's that I reference above. The FieldPoint Optomux VI's are instantiations of each of the commands in the FP-1000/1001 Programmers Reference Manual.

3) The FP-SG-140 is a ne
wer module and has not yet made it into the FP-1000/1001 Programmers Reference Manual. I will post the proper range/attribute/command settings for the module later today or early tomorrow.

Regards,
Aaron

[Aaron_G]

Rainer,

The information for the FP-SG-140 is attached.

Regards,
Aaron

[Rainer Ehrt]

Hi Aaron,


> The information for the FP-SG-140 is attached.
>
> Regards,
> Aaron

thx very much. That is the information I needed to continue working.

Bye,
Rainer