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The Modbus master / client is unable to read the address of a 32 bit Modbus register in a StruxureWare Building Operation server

Issue

The Modbus master / client is unable to read the address of a 32 bit Modbus register in a Building Operation server

Environment

StruxureWare Building Operation server as a Modbus server / slave

Cause

When a Modbus master or client reads a 32 bit Modbus value, it will be reading 2 consecutive 16 bit registers. An error will occur if  two 32 bit Local Modbus Registers are created in Building Operation using consecutive register addresses. 

Resolution

When configuring 32 bit Local Modbus Registers in Building Operation, the next register address should not be used. Create the next Local Modbus Register using the 3rd available Modbus register address. 

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Last update:
‎2018-09-11 06:26 AM
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