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What is the maximum number of registers that can be read during a Modbus Request?

 Modubus request is not going through. Returning error code.
Product Line:
Control Expert (Unity Pro) Communication Function blocks 
Control Expert (Unity Pro) XL V13 
The modbus request is trying to access too many registers at the same time.
The number of registers read during a modbus request must not exceed 100 registers.
This applies to using the IO scanner or using Function blocks such as MBP_MSTR.
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