Communication system and communication method for transmitter conditioning chip
A technology of communication system and transmission chip, which is applied in the direction of instruments, electrical digital data processing, etc., can solve the problems of inconvenient production and achieve the effect of low cost and simplified circuit structure
Active Publication Date: 2017-01-25
SUZHOU NOVOSENSE MICROELECTRONICS CO LTD
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Problems solved by technology
[0004] Common communication protocols for serial ports, such as RS232, RS485 or I2C, SPI, etc., usually require more than two additional interface lines, which brings additional costs and also brings some inconvenience in production
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[0022] The present invention will be described in further detail below in combination with specific embodiments.
[0023] Such as image 3 As shown, a communication system for a transmitter conditioning chip of the present invention is disclosed. The system is based on a two-wire current output transmitter, including a sensor 10 and a sensor conditioning and transmitting chip 20, and the sensor 10 and the sensor conditioning and transmitting The chip 20 is connected, and the sensor conditioning and transmitting chip 20 multiplexes the positive power supply terminal LOOP+ for communication, and the positive power supply terminal LOOP+ is in the form of a voltage through the AC coupling input signal of the resistor R1 and the capacitor C1; the modulation loop current is transmitted as an output signal, that is The negative power supply terminal LOOP- is a signal output terminal. It does not need an additional communication interface, and compared with most traditional communica...
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The invention discloses a communication system for a transmitter conditioning chip. The communication system comprises a sensor and a sensor conditioning and transmitting chip. A positive power supply terminal LOOP+ is multiplexed for communication by the sensor conditioning and transmitting chip, a signal is input in a form of voltage through ac coupling of resistance R1 and capacity C1 at the positive power supply terminal LOOP+; loop current is modulated to transmit an output signal, which means a negative power supply terminal LOOP- is taken as a signal output terminal. No additional communication interface is required, and interface resource is saved. A communication mode of the communication system can be switched to a current transmitting and outputting state flexibly. A communication time window is arranged when the chip is electrified; when a communication mode command is detected entering the communication time window, the chip enters the communication mode, otherwise the chip exits from the communication mode and enters the normal current transmitting and outputting state; in the communication mode, the chip is enabled to enter the normal current transmitting and outputting state by means of issuing a communication mode exiting mode, or the chip is enabled to enter the normal current transmitting and outputting state automatically when being electrified again by means of issuing a communication mode forbidding command. The communication system and the communication method for the transmitter conditioning chip are convenient for users.
Description
technical field [0001] The invention relates to a communication mode of a chip, in particular to a communication system and method for regulating a chip of a transmitter. Background technique [0002] Two-wire 4mA~20mA current output transmitters are widely used in various industrial control fields, used to detect various signals such as pressure, temperature, flow through sensors, and then calibrated by the conditioning chip to realize current transmission output . The conditioning circuit of the transmitter usually needs to provide a communication interface to calibrate and program the transmitter in the production process or in the industrial field. Common communication interfaces include two, HART (Highway Addressable Remote Transducer Communication Protocol) or serial port. [0003] figure 1 It is a transmitter solution based on the HART communication protocol, including sensors, sensor conditioning and transmission chips, HART modem chips and resistor-capacitor coup...
Claims
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IPC IPC(8): G06F13/40
CPCG06F13/4068Y02D30/70
Inventor 陈奇辉盛云
Owner SUZHOU NOVOSENSE MICROELECTRONICS CO LTD