MODBUS PROTOCOL
Description
Modicon PLC's can communicate with each other and with many other devices over a variety of networks. Supported networks include the Modicon Modbus and Modbus Plus industrial networks, and standard networks such as Ethernet. Networks are accessed by built–in ports in the controllers or by network adapters, option modules, and gateways that are available from Modicon and other third party vendors.
Learning Outcomes
This course explains the common language used by all Modicon controllers (and other OEM's), using the Modbus protocol. You wil learn about the message structure that controllers and other compliant devices will recognize and use, regardless of the type of networks over which they communicate. You will also learn about the process a controller/master uses to request access to another device, how it will respond to requests from the other devices, and how errors will be detected and reported.
Outline
- Principles of Communication
- Media
- Hardware
- Software
- Master Slave Communication Concept
- Protocol
- Error Checking
- Messaging System
- Timing Considerations
- Constructing the Querry
- Labs
- Calculation of Checksum
- Exercises
- Sending the Querry
- Labs
- Handling the Slave Response
- Labs
- Parsing the Slave Data
- Final Project Lab
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Duration
8 hours (one day)
Audience
This class is designed primarily for Control Engineers.
Course Material
Each participant will receive their own class binder with all reference material and exercises, so that these can be repeated later.
Hands-On Exercises
Each participant will have the opportunity to work on a training simulator and perform simple data exchange functions. |
