Problem with remote transmission of thermal power station data
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There are four heating units in the thermal power station, with each unit equipped with a control cabinet. How should the data from these control cabinets be transmitted to the heat network monitoring center? Should it be transmitted separately or centrally? And if transmitted separately, how should that be done? How should it be done if transmitted centrally?
Is it an urban heat station? If so, VPN
In a thermal power station, four control cabinets should be placed close together; it is recommended to use one control cabinet instead. Generally, control cabinets are equipped with reserved RS485 interfaces; a PLC is used to collect data, which is then uploaded to the monitoring center via GPRS. If the control cabinet does not have an RS485 interface, it becomes a bit troublesome; signal distributors need to be added for each parameter, which increases the cost. If the four control cabinets are far apart, a PLC is installed for each control cabinet. @Youlan_MHBU: Could you provide more details about the situation on site?
Each control cabinet is a PLC-controlled cabinet, with around 50 sensors in each one. Now, the data from each cabinet needs to be uploaded to the monitoring center. How should this be done?
If their control cabinets have available RS485 interfaces on their PLCs, then we typically use a Siemens 200SMART unit to collect data from those four PLCs via the RS485 interfaces. We assign different device addresses to their PLCs, such as addresses 2, 3, 4, and 5, and then, in accordance with the communication protocol, we parse the data and store it in our Siemens 200SMART unit. Configure the Shenzhen Hongdian DTU again to transmit data to the monitoring center.