Our Brands

Welcome to the Schneider Electric Website

Welcome to our website.
		
How can we help you today?
How to unpack a Modbus holding register as 16 bits using the Modbus scanner in a SCADAPack x70 RTU
Some vendors and some users like to bit-pack 16 single Modbus coils into a holding register. This enables a SCADA host or SCADA client RTU/PLC to get 16 bits of information along with other analog data in a single poll to a remote outstation using Modbus function code 03 (Read holding registers).

When a SCADAPack x70 device is acting as Modbus client, it can unpack the bits and place them into individual objects. This is easily done through configuration of the Modbus scanner and no logic is needed to unpack the bits using logic.

When configurating the Modbus scanner in RemoteConnect the user needs to select “UINT (Digital)” as the data type of what needs to be polled. This will automatically poll the holding register and break it out to individual objects when the data is returned to the SCADAPack. These individual binary objects can be assigned to logic (if needed) or can be assigned individual Modbus/DNP address’ to be polled from a SCADA system or other RTU/PLC client.

Below is an example of the SCADApack Modbus Scanner settings that are needed to unpack the 16 bits without logic.

Scanner unpacked bits

Schneider Electric Egypt and North East Africa

How to unpack a Modbus holding register as 16 bits using the Modbus scanner in a SCADAPack x70 RTU
Some vendors and some users like to bit-pack 16 single Modbus coils into a holding register. This enables a SCADA host or SCADA client RTU/PLC to get 16 bits of information along with other analog data in a single poll to a remote outstation using Modbus function code 03 (Read holding registers).

When a SCADAPack x70 device is acting as Modbus client, it can unpack the bits and place them into individual objects. This is easily done through configuration of the Modbus scanner and no logic is needed to unpack the bits using logic.

When configurating the Modbus scanner in RemoteConnect the user needs to select “UINT (Digital)” as the data type of what needs to be polled. This will automatically poll the holding register and break it out to individual objects when the data is returned to the SCADAPack. These individual binary objects can be assigned to logic (if needed) or can be assigned individual Modbus/DNP address’ to be polled from a SCADA system or other RTU/PLC client.

Below is an example of the SCADApack Modbus Scanner settings that are needed to unpack the 16 bits without logic.

Scanner unpacked bits
 

Schneider Electric Egypt and North East Africa

Explore more
Range:
Explore more
Range:
Users group

Discuss this topic with experts

Visit our community and get advice from experts and peers on this topic and more
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range:
Explore more
Range:

Need help?

  • Product Selector

    Quickly and easily find the right products and accessories for your applications.

  • Get a Quote

    Start your sales enquiry online and an expert will connect with you.

  • Where to buy?

    Easily find the nearest Schneider Electric distributor in your location.

  • Help Center

    Find support resources for all your needs, in one place.

  • Products Documentation
  • Software Downloads
  • Product Selector
  • Product Substitution and Replacement
  • Help and Contact Center
  • Find our Offices
  • Get a Quote
  • Where to buy
  • Careers
  • Company Profile
  • Report a misconduct
  • Accessibility
  • Newsroom
  • Investors
  • EcoStruxure
  • Job Search
  • Blog
  • Privacy Policy
  • Cookie Notice
  • Terms of use
  • Change your cookie settings
Your browser is out of date and has known security issues.

It also may not display all features of this website or other websites.

Please upgrade your browser to access all of the features of this website.

Latest version for Google Chrome, Mozilla Firefox or Microsoft Edgeis recommended for optimal functionality.