Modbus Slave

Modernize Your Polling Engine without a Major HMI Upgrade

AUTOSOL’s Modbus Slave can provide a Modbus interface to any OPC server software, extending the life of in-place assets and helping to future-proof operational growth.

When paired with AUTOSOL Communication Manager® (ACM), Modbus Slave can translate all of ACM’s protocols to Modbus for your legacy HMIs and historians.

Enable efficient communication between modern and legacy systems.

The RTU/PLC interface in AUTOSOL Modbus Slave will respond to Modbus requests sent by a Modbus Master, supporting Standard, Daniels, Enron, AUTOSOL and Extended Modbus protocols.

  • Extend the life of existing assets that use Modbus protocols

  • Add and easily configure multiple OPC servers in line with operational needs

  • Enable efficient data communications over low bandwidth connections

Request a Demo How to Buy

Modbus Slave Key Features

Modbus Slave register sets can be added and configured from the Register Records window with a variety of options.

Features Include:

  • Ability to add and configure multiple Modbus Slave register sets from the Register Records window with the following options: Auto Fill, Message Format, Error Check, Byte Order, Find Request by Function Code, and Enable Diagnostics
  • Automatic startup using a specified configuration file
  • Project Supervisor to configure Modbus Slave to run independently as a background service
  • Ability to add and configure multiple OPC Servers (including data and diagnostic items for each server)
  • Mapping of multiple protocols in the Protocol Configuration window with the ability to specify a targeted server for each protocol and diagnostic option
  • Ability to add and configure multiple radio, serial and/or modem ports from the Port Configuration window
  • Modification lock mode to prevent modifications from being made to the program when activated from the slave
  • A logger that is used to monitor incoming and outgoing traffic as well as spot errors (log events can be specified on a per-port basis)


  • Serial cable or leased-line, dial-up telephone or cellular phone, and TCP/IP and UDP/IP telemetry media
  • Modbus protocols, including Standard, Daniels, Enron, AUTOSOL Extended Modbus, and custom register definitions
  • OPC-DA (Open Platform Communications Data Access) server interface
  • Server Status Check and Automatic Reconnect SCADA capabilities

Download Data Sheet

Robust Protocol Support with One Platform

Modbus Slave is an add-on application that was developed to efficiently translate to Modbus all of the OPC protocols supported by AUTOSOL’s polling engines, which include:

ACM – AUTOSOL Communications Manager®

ACM AUTOSOL Communications Manager®

ACM R/T SCADA Real-Time Only Edition

ACM R/T SCADA Real-Time Only Edition

eACM Edge-Based Polling Engine

eACM Edge-Based Polling Engine

In need of integration services?

AUTOSOL can partner with your selected integrator or provide integration services independently to support your HMI requirements.


Tell us your industrial data communications challenges.