Faq; Q1: What Are The Maximum Numbers Of Polling Definition And Local Register; Q2: What Is The Maximum Number Of Registers Can Be Accessed In One Modbus Command - ICP DAS USA MDC-700 Series User Manual

4. FAQ
Q1: What are the maximum numbers of polling definition and local register?
A1: The maximum number of polling definition in a MDC‐700 is 240, each definition can access up
to 64 registers. Each of the four tables (DI/DO/AI/DO) can store up to 9600 registers for polled
data.
Q2: What is the maximum number of registers can be accessed in one Modbus
command from a Modbus master device?
A2: By following the Modbus protocol, the maximum amount of registers that one command can
access is 255 of function code 01 and 02, and 126 of function code 03 and 04.
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