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Method for handling errors in bus communication and bus communications system

A bus error and bus communication technology, applied in the field of error handling, can solve problems such as damage to error handling, and achieve the effect of accurate error identification

Pending Publication Date: 2019-12-31
KROHNE MESSTECHNICK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, an error recognized by a bus member cannot be identified unambiguously or at all by another bus member by analyzing the bus error code, thereby compromising error handling

Method used

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  • Method for handling errors in bus communication and bus communications system
  • Method for handling errors in bus communication and bus communications system
  • Method for handling errors in bus communication and bus communications system

Examples

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Embodiment Construction

[0036] figure 1 An embodiment of a bus communication system 1 used in process automation is shown. The bus communication system has a first bus member 2 , a second bus member 3 and a wired bus 4 . The first bus member 2 is a magnetic-inductive flowmeter, which is designed as a field device and has a memory 5 . The second bus member 3 is a management system and has a display 6 . The second bus member 3 controls the first bus member 2 .

[0037] The first bus member 2 and the second bus member 3 are designed for bus communication with one another via the bus 4 according to the Modbus protocol. According to the Modbus protocol, the first bus member 2 is a server and the second bus member 3 is a client. The Modbus protocol defines bus error codes on the one hand and bus messages on the other. The bus error code according to the Modbus protocol is the bus error code 0x04 "Server Device Failure". clear. As a result, error handling is compromised. Each bus message 7 has a bus...

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Abstract

The invention relates to a method for error handling during bus communication between a first and a second bus member according to a bus protocol. The bus protocol in the method defines at least one bus error code for an error and a bus message having a bus data field. If the first bus member identifies an error, the following steps are performed. The first bus member stores an error identification of the error supplemented with a bus error code in the first bus member, generates a first bus message and writes the bus error code into a bus data field of the first bus message. The second bus member generates a second bus message triggered by the bus error code, which has a request for transmitting an error identification. The first bus member generates a third bus message triggered by the request and writes the stored error identification into the bus data field of the third bus message. The second bus member identifies the error by analyzing the bus error code and the error identification.

Description

technical field [0001] The invention relates to a method for error handling during bus communication between a first bus member and a second bus member according to the bus protocol. The bus protocol in this method defines at least one error-specific bus error code and a bus message with a bus data field. If the first bus member detects an error, the following steps are carried out. The first bus member generates a first bus message and writes a bus error code into a bus data field of the first bus message. A first bus message is transmitted from the first bus member to the second bus member. The second bus member identifies the error by analyzing the bus error code. [0002] On the other hand, the invention also relates to a bus communication system having a first bus member, a second bus member and a bus. The first bus member and the second bus member are designed for bus communication with one another via the bus according to the bus protocol. As in the method, the bus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/40H04L29/06
CPCH04L12/40006H04L43/0823H04L69/26H04L2012/40228G06F11/0751G06F11/0796G06F11/221G06F11/2273G06F11/3027G06F11/006G06F11/349G06F13/42
Inventor J.克雷默
Owner KROHNE MESSTECHNICK GMBH & CO KG
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