189847-1

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189847-1 application field and working principle

The 189847-1 standard is an international series of standards used for the natural gas, petroleum, and hazardous chemicals industry in the operational level of measurement, manipulation, and control. This standard is the family of industrial process control communications protocols also referred to as HART, substitute some of the existing industrial mechanical and electrical controls by using a digital communication system. The HART protocol uses a proprietary communication between the control loop and the host system for operational and maintenance activities.

One of the primary applications of 189847-1 is in distributed control systems. In these systems, one computer is responsible for controlling the operation of multiple machines. The HART protocol is used to communicate between the control device and the other machines in the system. This allows the control device to monitor and control the operations of the machines in the system. The HART protocol can also be used in combination with other industrial communications protocols like the Modbus and PROFIBUS protocols. For example, in a system where Modbus is used for communication between machines, HART can be used for communication with the control device.

The 189847-1 protocol is based on a master/slave model. The master will send commands to the slaves and receive responses from the slaves. The HART protocol uses a 4-bit data exchange. The master device will send the data and then wait for the response. The response data is sent back to the master and the process is repeated until the entire data exchange is complete. The 189847-1 protocol also uses a 4-bit start signal which is used to initiate the data exchange.

The key differences between HART and other protocols used in the industrial process control communications are that it is a proprietary protocol, uses the 4-bit data exchange and utilizes the 4-bit start signal. The 189847-1 protocol is also not well suited for long-distance transmissions.

The working principle of the 189847-1 protocol is relatively simple. The master device will transmit a command and then wait for a response from the slave. The slave will then send back a response that will include a status code, an error code, and a data set. The master device will then use the data set to determine the next action. If an error code is encountered, the master device will re-transfer the command until it receives the results desired. This process continues until all commands have been transmitted and received by the slave devices.

The 189847-1 protocol is an important standard for the industrial process control communications. It can be used to replace existing mechanical and electrical control systems in many applications. It is also useful in combination with other protocols such as Modbus and PROFIBUS. Finally, the protocol is simple to understand and use, making it a suitable choice for many industrial applications.

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