Technical description of a remote temperature monitoring system built on LonWorks fieldbus, telephone and modem technology.
The paper presents a remote temperature communication monitoring system that uses LonWorks fieldbus, public telephone network and modem technology. It details the overall system architecture, hardware components such as Neuron 3150 smart nodes, EPROM storage, and the software design for both local node communication and remote data transfer.
Hardware design includes Neuron 3150 chips with 11 I/O pins, 27C256 EPROM (32 KB), and AD conversion to 1‑5 V signals. Software design covers Neuron C programming, network variable communication, and serial interface configuration (9600 bps) for modem connections. An adapter implementation using a P89C51 microcontroller provides RS‑232/485 to LonTalk protocol conversion. This manual is written in Chinese.
| Neuron chip model | 3150 |
|---|---|
| EPROM storage | 32KB |
| Serial communication speed | 9600 bps |
| Number of I/O pins on 3150 chip | 11 |
The serial interface is configured for a transmission rate of 9600 bps.
Each smart node uses a Neuron 3150 chip as its core.
The system provides 32 KB of EPROM storage (27C256) for the user program.