Method for transferring data between an automation field device and a communication box
A field device, data transmission technology, applied in the direction of data exchange through path configuration, data exchange network, data exchange details, etc., can solve problems such as large space and high cost
Active Publication Date: 2022-06-07
EHNDRESS KHAUZER GMBKH KO KG
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- Description
- Claims
- Application Information
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Problems solved by technology
[0006] However, the components used to implement HART communication, especially the FSK modem, require a relatively large space and are also relatively expensive, which is undesirable in the case of producing field devices at low cost
Method used
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Embodiment Construction
[0033] figure 1 A schematic diagram of a system 1 according to the invention is shown, comprising automated field devices 2 , a communication box 4 for data transmission and a two-wire line 3 .
[0034] The communication box 4 and the field device 2 are connected to each other via a two-wire line 3 for conducting data. Via the two-wire line 3, the field device 2 is supplied with the supply voltage U V , for example via a feed adapter ( figure 1 not shown). In addition to the power supply, the process variable detected by the field device 2 is sent to a higher-level unit (eg a PLC, figure 1 (also not shown in ) also takes place via the two-wire line 3 . It goes without saying that in the case where the field device 2 is used as an actuator, the control value is sent from the higher-level unit to the field device 2 via the two-wire line 3 .
[0035] In order to send any additional data between the communication box 4 and the field device 2, eg data for parameterization, the...
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The invention relates to a method for transferring data between an automated field device (2) and a communication box (4), wherein the method comprises the following steps: the communication box (4) supplies the field device (2) with a voltage ( u V ) for voltage modulation, so that the first communication signal (5) is generated and the supply voltage (U V ) with a first communication signal (5); from the supply voltage (U V ) to demodulate the first communication signal (5), so that the first communication signal (5) and the supply voltage (U V ) separation; the field device (2) to the output current of the field device (I A ) for current modulation, so that the second communication signal (6) is generated and the output current (I A ) has the second communication signal (6); the communication box (4) from the output current (I A ) demodulates the second communication signal (6), so that the second communication signal (6) and the output current (I A ) separation.
Description
technical field [0001] The present invention relates to a method for transferring data between an automation field device and a communication box, an automation field device and a communication box. Background technique [0002] Field devices for recording and / or modifying process variables are commonly used in process automation as well as manufacturing automation. Measuring devices or sensors, such as level measuring devices, flow meters, pressure and temperature measuring devices, pH-redox potentiometers, conductivity meters, etc., for recording corresponding process variables such as level, flow, pressure, temperature, pH levels and conductivity. Actuators, such as valves or pumps, are used to affect process variables. Thus, the flow rate of the fluid in the pipe section or the fill level in the container can be varied by the actuator. [0003] The Endress+Hauser group of companies manufactures and sells a wide variety of such field devices. [0004] In automation, f...
Claims
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IPC IPC(8): H04L12/10H04L12/40H04B3/54
CPCH04B3/542H04B3/548H04L12/10H04L12/40045
Inventor 西蒙·格尔维希哈拉尔德·朔伊布勒沃尔夫冈·布鲁钦
Owner EHNDRESS KHAUZER GMBKH KO KG