How does multimode gateway 2 realize alarm?

Data collection and reporting is the basic function of the Internet of Things system, but there are also some applications that need abnormal data to realize local alarm at the edge. Generally, the data anomaly alarm is realized by monitoring on the cloud Internet of Things platform. In other words, the platform receives data and analyzes whether the current data exceeds the threshold. When the threshold is exceeded, the system will give an alarm and carry out equipment linkage. With the increasing access of Internet of Things terminals, the pressure of platform analysis and processing is increasing. At present, the Internet of Things system tends to move the abnormal alarm of monitoring data to the edge Internet of Things gateway.

Taking BMG500 of Internet of Things as an example, this paper introduces modbus rules and the setting of local alarm parameters.

BMG500 Internet of Things Gateway

Modbus rule setting instructions

Serial number: user-defined serial number, and the serial number of each rule is unique.

Device name: the name of the lower computer device.

Interface: which interface is used to communicate with the lower computer equipment (com1/com2/TCP1… TCP 5)?

Element name: registered name, please do not set Chinese.

Device ID: slave station ID

Function code: modbus function code

Start address: register address

Number: Number of data address bits read by a single instruction.

Collection cycle: data reading polling cycle.

Reporting Center: Each gateway can be configured with 5 service centers, which can transmit data to a single center or multiple centers.

Submission theme: each service center can set multiple data submission themes, which can indicate which theme changes the data value.

Upper and lower limits: by setting the trigger conditions of the upper and lower limits, the triggered data value can be reported to the service center through the alarm subject.

Unit: The unit of data value.

Operator/Operand: The collected original values can be added, subtracted, multiplied and divided before being reported to the service center.

Precision: Number of decimal places of collected data values.

Data type:

Data can be divided into integer and floating-point types; Among them, there are two cases of plastic data: signed and unsigned; Each data type is sorted differently according to the size end, and the corresponding byte order needs to be selected according to the data type of the lower computer register.

On the server configuration, set the subject of the alarm.

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Internet of things

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The Internet of Things refers to the real-time collection of any objects that need to be monitored, connected and interacted through information sensors, radio frequency identification technology, global positioning system, infrared sensors, laser scanners and other devices and technologies. ...

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