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Modbus Holding REAL[Array limitation] ???
February 19, 2021
13:37, EET
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gbo
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Hello
For the moment on my new machine i’am making test of a modbus server in demo mode (time limitation)
On this project i work on a lot of variables (1000 variables)
Each variables are in 100 holding register array
It’s not working to enter array[100] there is a limitation to 62 ?????

https://i.postimg.cc/3ynwCzkr/array.jpgImage Enlarger

February 19, 2021
14:20, EET
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Matti Siponen
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Hello,

Modbus Protocol supports reading 2000 bits per Read call. A Real requires 32 bits to store and thus 62 Reals can be fit into an Array of 2000 bits. At the moment, the Modbus Server doesn’t support arrays consisting of more than 2000 bits of data.

Could you try processing the array of 100 Reals as either 2 arrays of 50 Reals or 100 scalar Reals in Modbus Server instead?

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