Measure 16 strain gages simultaneously with SBRIO 9626 + 2 NI 9235 modules

Hello everyone,
I am currently working on a deformation measuring application. I need to measure 16 strain gages simultaneously, using a SBRIO 9626 + NI 9693 (two C Slots) + 2 NI 9235. I started checking out the example included for measuring strain with shunt calibration on 4 gages with one 9235 module through the FPGA, modded it to read 8 gages without any issue.
The problem comes up when i try to use two modules for reading 16 gages. I modified the getting started example in serveral ways without any success, only can read continuously the 9235 on slot 1, and apparently, i only get an initial reading on the other 9235, and then nothing more. Below is attached the code (note that i am no expert on FPGAs, and i've been trying different configurations, and at some point, not precisely knowing what i was doing ), any advice on how to put both 9235 to work simultaneously will be appreciated.
thank you.

Hi s.jimenez
First of all, thank you for your prompt answer. Regarding your suggestion, i hadn't checked the Basic Synchronizing NI 923x example, my bad . After reading and understanding it a little, i tried to adapt it to my situation, sadly with no success. Some of the mistakes that i corrected were:
one FIFO for acquiring data from both modules
used single I/O nodes for start/stop and acquiring data from both modules
changed the clock settings of the modules to: slot1 module providing clock signal for the slot2 module
the only big difference that i notice between the example is that i added the shunt calibration procedure to the sequence, do you think this is the problem?
summing up, i havent been able to obtain continuous readings from the second module, any additional help could be greatly appreciated.
best regards.

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Hi Jim,
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I have 5 SCC-SG02s in my signial conditioning
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Message Edited by SarahB on 07-06-2006 09:14 AM
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strain test error.doc ‏493 KB

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block diagram.JPG ‏134 KB
DAQmx.JPG ‏129 KB

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