Method for adding modbus equipment in customized manner

Abstract

The invention discloses a method for adding modbus equipment in a customized manner. An address of modbus equipment and a plurality of sensor addresses have a mapping relation, the plurality of sensor addresses and corresponding modbus register addresses have a mapping relation, and registers are used for storing different kinds of acquired data of the modbus equipment and transferring data in the registers to a data acquiring system. The method comprises the following steps: inputting a parameter of the modbus equipment into the data acquiring system, establishing a parameter configuration file; establishing a register table; establishing a channel between the data acquiring system and each register; generating a channel table; setting a name of each channel, and loading in the channel table; and initializing a total acquiring table, wherein the total acquiring table uses data stored in the registers as variables and each datum corresponds to a channel address and a channel name of each corresponding channel. According to the method, the modbus equipment is added in the data acquiring system by virtue of a customized manner, and data in the modbus equipment is acquired, so that the purpose that one system is used for simultaneously acquiring data of multiple kinds of equipment is realized.

Description

technical field [0001] The invention relates to a method for adding modbus equipment in a data acquisition system. More specifically, the present invention relates to a method for customizing and adding modbus equipment in a data acquisition system. Background technique [0002] The use of CVT format files is a way to collect data between NI CRIO terminals or PXI terminals and Labview workstations. This method is efficient and fast, and is suitable for large-capacity data communication and large-scale data acquisition systems, but for modbus For the data acquisition of the equipment, it is necessary to program each modbus equipment separately to realize the data acquisition function. [0003] Among many equipment communication protocols, the modbus protocol is the most widely used protocol. It can be used in low-speed 232, 485 communication, and high-speed Ethernet communication. In the acquisition system, the equipment using the modbus protocol is very widely. Therefore,...

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Problems solved by technology

[0004] The acquisition system based on CVT (current value table) and CCC compiled by Labview can easily collect the values ​​of NI devices such as CRIO, PXI and other devices, but it cannot conveniently collect other data, and there are a lot of modbus data in practical applications. Equipment and modbus data acquisition equipment, it is very important to use a method that can be set and expanded to collect and control modbus equipment

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