SSI Technologies -Application Note AT-AN14 Acu-Trac™ Smart 485 Messaging
SSI’s Acu-Trac™ Smart 485 ultrasonic level transducers broadcast and receive commands over a standard TIA/EIA RS-485 serial data bus enabling the transducers to communicate and share data with other modules located on the data link. The Smart 485 has two types of RS-485 messaging – programming commands and timed data broadcast message (PID 96).
The RS-485 data link is a serial data link meaning that messages are transmitted one bit at time in sequence until the entire message has been completed. Idle states, I.E. the down time in-between messages is used to signal the 485 bus availability to other transmitting nodes within the network.
The Acu-Trac™ Smart 485 ultrasonic level transducer is designed to communicate at a rate of 9600 baud. During normal operation, the Acu-Trac® Smart 485 will broadcast a 19 byte volume measurement message every 0.50 seconds consuming approximately 4% of the available data link bandwidth.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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August 30, 2012 |
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AT-AN14 |
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280 KB |
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