Method for transmitting a process map via a gateway device

摘要

Exemplary methods and systems are directed to transmitting a process map of a control or automation system via a gateway device. The gateway device includes at least one first functional unit connected to a higher-ranking control unit via a first communications link based on a primary field bus protocol, and at least one second functional unit connected to at least one field device via a second communications link based on a secondary field bus protocol. Binary signals are stored in corresponding registers and analog signals, which are in an integer format, are transmitted to the first functional unit such that the number of binary signals is reduced by packing the binary signals into data bytes. The data bytes are translated into corresponding telegrams that can be processed by the primary field bus protocol and with the analog signals are transmitted to the higher-ranking control unit.

主权项

1. A method for transmitting a process map of a control or automation system via a gateway device including at least one first functional unit, to which a superordinate control unit is connected via a first communications link based on a primary field bus protocol, and at least one second functional unit, to which at least one field device is connected via a second communications link based on a secondary field bus protocol, the method comprising:
transmitting process variables, which are provided by the field devices, as process data objects based on the secondary field bus protocol, wherein the process variables are transmitted as messages to the second functional unit of the gateway device; allocating corresponding registers in a binary format to the process data objects in a form of digital signals; allocating corresponding addresses in an integer format to the process data objects in a form of analog signals; and transmitting the digital signals stored in the corresponding registers and the analog signals in the integer format to the first functional unit such that the number of binary signals is reduced by packing the binary signals into respective data bytes with no overhead for each data bit, the binary signals are translated into corresponding messages which can be processed by the primary field bus protocol, and are transmitted, together with the analog signals in the integer format, to the superordinate control unit based on the primary field bus protocol.