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Hart modem and diagnostic system

A modem and diagnostic device technology, applied in the direction of modulated carrier system, general control system, control/regulation system, etc., can solve the problem of time-consuming, etc., and achieve the effect of high-efficiency waveform confirmation

Active Publication Date: 2021-05-14
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in investigations using an oscilloscope, after acquiring digital communication waveforms, there is a problem that it is time-consuming to search for inspection sites by scrolling on the screen, etc.

Method used

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  • Hart modem and diagnostic system
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  • Hart modem and diagnostic system

Examples

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Comparison scheme
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no. 1 example

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a block diagram showing the configuration of the diagnosis system according to the first embodiment of the present invention. The diagnosis system includes, for example, a HART device 1 as a field device such as a pressure transmitter and a positioner, a diagnosis device 2 , and a HART modem 3 as a communication device that relays communication between the HART device 1 and the diagnosis device 2 or a host device 5 .

[0029] The diagnosis device 2 is equipped with a communication interface part 20, which controls the communication with the HART modem 3; and a waveform acquisition timing instruction part 21, which, when receiving the designation of the acquisition timing of the HART communication signal from the user, sends an instruction signal indicating the acquisition timing. to the HART modem 3; a communication waveform display section 22, which displa...

no. 2 example

[0060] Next, a second embodiment of the present invention will be described. Figure 5 is a block diagram showing the configuration of the diagnostic system of the second embodiment of the present invention, and figure 1 The same constituents identify the same symbols. The diagnostic device 2a of this embodiment includes a communication interface unit 20, a waveform acquisition timing instruction unit 21, a communication waveform display unit 22a, and a communication waveform generation unit 23a.

[0061] The HART modem 3a of the present embodiment includes a HART communication unit 30, a HART / host communication conversion unit 31, a communication interface unit 32, a waveform acquisition management unit 33a, a communication content monitoring unit 34a, a communication waveform detection unit 35a, and a communication waveform temporary storage unit 36 and a clock portion 38 for measuring time.

[0062] Figure 6 is a flowchart illustrating the signal waveform display functi...

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Abstract

A HART modem and a diagnostic system of the present invention efficiently confirm a signal waveform of HART communication. The HART modem (3) is provided with a HART / host communication conversion part (31) that relays communication between a HART device (1) and a diagnostic device (2) or a host device (5); a communication waveform detection part (35) that records, in a communication waveform temporary storage part (36), data obtained by sampling HART communication signals transmitted and received between the HART device (1) and the communication waveform detection part (35); a communication content monitoring part (34) that monitors the content of HART communication and instructs the communication waveform detection part (35) to start and stop recording of the data at the acquisition timing of the signal specified from the user; and a waveform acquisition management part (33) that transmits the data stored in the communication waveform temporary storage part (36) to the diagnostic device (2) when recording of the data is stopped.

Description

technical field [0001] The present invention relates to a HART modem and a diagnostic system for confirming signals of HART communication. Background technique [0002] HART (Highway Addressable Remote Transducer, addressable remote sensor high-speed channel) communication is a communication method that superimposes digital signals on the 4-20mA DC signal (analog signal) used in the control system. HART communication is used for device setting by connecting a HART-compatible configurator (setter) to an analog signal line after replacing field devices (devices) of an existing control system with HART-compatible products. In addition, HART communication is used to send and receive the measurement data of the device for monitoring and control, or to send and receive the self-diagnosis results of the device and judge the soundness of the measured value and the replacement period of the device in the equipment management system connected in parallel with the control system (see p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04L12/26H04L27/00H04L69/40
CPCH04B17/0085H04L43/18H04L43/045H04L27/0002H04M11/066G05B2219/31368G05B19/4155H04B3/46G06F2201/835H04L5/02
Inventor 古泽直树笼浦守深尾直之津金宏行
Owner YAMATAKE HONEYWELL CO LTD
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