Fieldbus isn’t really one thing but more of a collection of things. Fieldbus is a group of protocols that are used in the industrial arena.
The Fieldbus protocols have been standardized as IEC61158.
Prior to Fieldbus, industrial controller systems were connected using RS232 serial communications.
As you know, serial communications allowed only two devices to communicate.
Whereas today, the Fieldbus connections are more closely compared to the typical Ethernet connections where you can connect multiple field devices to a single connection point that would then connect to the controller.
The connections to the Fieldbus components, with the exception of the field devices themselves, are single cable connections. This connection scheme may vary depending on the Fieldbus protocol that you are using.
This type of field device connection saves on wiring runs that would have to go all the way back to the controller.
As you can see, this type of device wiring would have many benefits when the distance is an issue.
As you can imagine, your controller system will need to have a communications module that will be able to establish communications with the field devices.
In the case of ControlNet, you would need a ControlNet module, Profibus would need a Profibus module, etc.
By Mondi Anderson
Automation EngineerPosted on Jan 7, 2019
5 ACTIONABLE TIPS FOR GETTING A PLC PROGRAMMING JOB WITH NO EXPERIENCE The mindset that helped me find my ideal job as a PLC programmer with NO experience. Working as a PLC Programmer is one of the most attractive and highest paying jobs in the engineering industry....
When engineers design modern process plants, they specify sensors to measure important process variables, such as flow, level, pressure, and temperature. These measurements are used to help the process control system adjust the valves, pumps and other actuators in the...
Have you heard of IEEE 802.3? It has a long history and has to do with our topic today, Ethernet. 1. Introduction to Ethernet Ethernet is a communication standard that was developed in the early ’80s to network computers and other devices in a local environment such...
RealPars is the world's largest online learning platform for automation engineers.
+31 10 316 6400
Mon - Fri 8:30 am to 5:30 pm (CET)
Rotterdam Science Tower, 6th floor, Marconistraat 16
3029 AK Rotterdam, The Netherlands
© 2019 RealPras B.V. All rights reserved.