White paper warns: Data risk for RS-485 users
Many RS-485 users are unaware that they are taking unnecessary data risks because of the method they use for driver control, says a design engineer at Sealevel Systems. Common driver control methods are....
Liberty, SC – “Many RS-485 users are completely unaware that they are taking unnecessary risk with their data because of the method they use for driver control,” said Jeff Hunter, design engineer at Sealevel Systems Eliminate the Risk of RS-485 Data Corruption
The EIA RS-485 specification does not stipulate the method for controlling the driver; therefore, several options have evolved. Some have significant risk of data contention and corruption because of the time required for a device to relinquish control of the network once communication is complete.
Common RS-485 driver control methods are:
- Application program control (under Microsoft Windows);
- One-shot (which uses a circuit to activate the enable/deactivate signal);
- Enable driven when data present (a hardware approach connecting the transmitter data line to the transmitter enable pin);
- Automatic driver control (in which software automatically recognizes commands to transmit/disable); and
- Automatic hardware enable (the latest innovation that uses hardware circuitry on the board to control RS-485 communications).
A Sealevel Systems white paper, “
Sealevel Systems. New driver control methods can help RS-485 eliminate the risks of data contention and corruption, Hunter says.
Eliminate the Risk of RS-485 Data Corruption
,” evaluates the methods.
See related story:
|Search the online Automation Integrator Guide|
Case Study Database
Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.