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Modbus Read/Write Multiple registers

Issue

What is the maximum number of registers that can be read/written using the multiple read/write function codes in Modbus

Environment

StruxureWare Building Operation

Modbus

Cause

When deciding how to group registers using a Modbus Register Group, it is important to know the maximum number of registers that can be grouped.

Resolution

Read multiple registers = maximum 125 registers

Write multiple registers = maximum 121 registers

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Version history
Revision #:
1 of 1
Last update:
‎2018-09-06 09:06 AM
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