How to connect a TTI torque cell TRT-100 via TEDS DPM 3 to SCC-68

[Sasidhar]

Hi,

I am trying to connect a Transducer Technique Inc. (TTI)'s torque cell  TRT-100 to NI's SCC-68. The torque cell is TEDS compliant and is connected to TTI's digital panel meter (DPM-3). There is provision for reading the analog output directly from J4 connecter on DPM-3 which gives a 0-10V output. All I am confused is about the connections that run in between this and the SCC-68. What other connections are required on SCC-68 because when I was goin through the other topics in the forum they were talking something about different types of referenced signals. Can anyone help me out with this connection problems?

Any sort of help would be greatly appreciated.

Thanks,

Sasidhar Uppuganti

Research assisstant

Dept. of Biomedical engg.

The University of Akron.

[Brooks_C]

Hello Sasidhar,

It looks like the TRT-100 has support for use as a Virtual TEDS device so you should follow the steps in this developer zone for information on how to configure everything:  Upgrading Your System for Virtual TEDS

Unless you have the upgraded version of the TRT-100 that has hardware TEDS support this should be what you're looking for.  If you do have this please post back and we can look into that.

Cheers,

[SasidharUppuganti]

Thanks Brooks, I followed the link you provided and managed to get the virtual TEDS in place. I also gave the connections in between DPM3 and SCC-68 as shown in the connection diagram tab in the NI-DAQmx tasks section. i.e. -10 to +10 V pin to pin 68 (AI0) and isolated gnd to pin 34 (AI8) on SCC-68. I am new to LabVIEW environment, so can you please guide me as to how do I read the voltage that is being generated by the torque cell when I am turning it in MAX. In a bigger picture, I am basically trying to control the rotation of a motor when torque reaches certain limit. I would greatly appreciate your help.

Thanks once again.

Sasidhar.

[SasidharUppuganti]

Thanks Brooks, I followed the link you provided and managed to get the virtual TEDS in place. I also gave the connections in between DPM3 and SCC-68 as shown in the connection diagram tab in the NI-DAQmx tasks section. i.e. -10 to +10 V pin to pin 68 (AI0) and isolated gnd to pin 34 (AI8) on SCC-68. I am new to LabVIEW environment, so can you please guide me as to how do I read the voltage that is being generated by the torque cell when I am turning it in MAX. In a bigger picture, I am basically trying to control the rotation of a motor when torque reaches certain limit. I would greatly appreciate your help.

Thanks once again.

Sasidhar.

[Brooks_C]

Hello Sasidhar,

Once you've configured the TEDS in the Measurement & Automation Explorer (MAX) then you just needs to left click the task in the left hand column and drag the reference into LabVIEW.  Figure 7b in the tutorial I mentioned above shows you the basic program for reading a TEDS task in LabVIEW.

Instead of using a DAQmx Create channel and DAQmx Timing VI you just need to Start, Read/Write and Close your TEDS task since the timing and channel configuration are handled in the MAX setup.

Cheers,