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fpga

Hi everyone, i am working on a project in which i have PXI system with 8135 RT controller, 7854-R and 7951-R modules.

I am having a PID loop VI running in 7854-R fpga card.The output if PID is sent to RT vi every 10 micro sec.

In RT vi the values are passed to 7951-R vi, where based on these values a PWM signal is getting generated.

The problem is if i pass the values every 10 micro sec, i am not able to generate PWM signal, but if i change rate to 10 milli sec, then its working perfect i am able to generate PWM properly. Please anyone suggest me what i should do and tell me if their are any benchmarks for loop rates which i should consider.Please do refer the vi's if required.

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