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 From A Modbus Master Device - ICP DAS USA MDCL-705i User Manual

9. FAQ

Q1: What are the maximum numbers of polling definition and local register?

A1: The maximum number of polling definition in a MDCL-705i is 250, each definition can access up
to 125 registers. Each of the four tables (DI/DO/AI/DO) can store up to 9600 registers of 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.
Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved. ∗ E-mail: service@icpdas.com
- 87 -