fieldpoint

[Tom_W_[DE]]

Hi Soup-

I do not see that behavior; I am testing with a FP ethernet module and a FP-TC-120.  The array returned from the FP Read is consistent with the data for all channels.  What hardware are you testing with?

Thanks-

[Soup]

I am also testing with an ethernet controller interface (FP-2000) with two FP-AI-110 modules and an FP-AO-200 module attached.  All of these modules output an 8-element array of zeroes when "All" is chosen as the Item Name whether I am reading from the FP Read.vi, the FieldPoint Express VI, or directly from MAX.  Meanwhile, all of these methods read the amps correctly (between .004 and .020) if I choose to read a single channel from the aforementioned modules.  However, I also have an FP-RLY-420 module attached and it reads the relays correctly if I choose the Item Name of "All" or a single channel.  Hmmm...

[Tom_W_[DE]]

EDIT: Double post

Message Edited by Tom W [DE] on 12-27-2005 05:08 PM

[Tom_W_[DE]]

EDIT: Triple Post

Message Edited by Tom W [DE] on 12-27-2005 05:07 PM

[Tom_W_[DE]]

Hi Soup-

Is it possible the voltage input circuitry has been damaged for your module?  I have replicated your setup and my AI-110 is operating perfectly.  Do you see correct voltage readings when you read from a single channel rather than "All?"

[Soup]

Tom W.,

Thanks for replying...

I currently have instruments with only current inputs and outputs attached to the FieldPoint modules, but I do read these values correctly (.004 to .020 Amps) when I read a single channel at a time.  This is actually what I have done to circumvent this dilemma of not being able to read the "All" item.  Do you think it will make a difference if I set up a voltage signal instead of a current signal?  I could try to set it up when one of the systems is not running if you think this will help you assess the situation.

[Tom_W_[DE]]

Hi Soup-

I have noticed in testing that if any channel is out of range the "All" channel readings are all zeros.  Can you confirm from MAX whether the Status readings for each channel indicate that any channels are out of range?  If so, a simple range adjustment my be able to remove the zero'd channels problem. 

[Soup]

All three of my analog modules read zeroes with "All" as the Item selected, but there is only one channel that is 'out of range'.  It is on channel 7 of my second FP-AI-110 module.  This channel is not currently being used so it is not wired to any sensor, therefore when running the system I only read the four wired channels one by one.  The first FP-AI-110 module is fully wired and all signals come back as 'Successful' to MAX, even the "All" line item. The FP-AO-200 module only has two channels wired, but all read 'Successful', including the "All" line item.

[Tom_W_[DE]]

Hi Soup-

To clarify then, is the "first" AI module returning good data in LabVIEW when you read the "All" channel?  It sounds like it is working properly in MAX.  I would suggest shorting the other channels or setting them to a range that will not be out of range when they're left disconnected.  This should let you scan the "All" channel without it returning zeroes due to the out of range error.

[Soup]

No, the first FP-AI-110 module and the FP-AO-200 module both read 'Successful' for all the channels singularly, as well as the "All" line item, but I still get all zeroes when I try to read these modules with the "All" Item Name.