Instrument Control (GPIB, Serial, VISA, IVI)

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Reduce break length between Modbus receive frame and new query

Hi All,

 

Hope can get some answers from you guys. Thanks in advance.

 

I'm using Modbus protocol for almost all application in my projects and I use Labview modbus library to help me on this.  Since there are a lot of IOs multidropping in 1 communication port, I'm trying to get the fastest response from all slaves. After analyzed the signals using an osciloscop, I found that my program takes about 100-200ms to read from 1 slave before giving a new modbus query. The break length between the receive signal and the new query is around 45ms. Is it possible to reduce this duration and how? 

 

Looking forward for any opinion on this. Thanks.
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