Network terminal cabinet system for distributed control system (DCS) instruction

Abstract

The invention discloses a network terminal cabinet system for a distributed control system (DCS) instruction, and belongs to the technical field of terminal cabinets. The network terminal cabinet system comprises a DCS instruction input terminal, a DCS instruction output terminal, a running status terminal, a process control terminal, a control linkage terminal, a power module, a DCS instruction input and output module, a programmable logic controller (PLC) data processing module, a status collection module and a communication terminal, wherein the DCS instruction input and output module, the PLC data processing module and the status collection module are connected with the power module; the communication terminal is connected with the PLC data processing module; the running status terminal is connected with the status collection module; and the PLC data processing module is also connected with the DCS instruction input and output module and the status collection module. The system is low in cost, has a DCS instruction status variation and variation time recording function, and can upload recorded information to a substation supervisory control and data acquisition (SCADA) system, acquire the running status of each loop of a motor control center (MCC) in a centralized way, perform data processing and remotely transmit data to a DCS instruction room.

Description

technical field [0001] The invention belongs to the technical field of terminal cabinets, and in particular relates to a network terminal cabinet system for DCS commands. Background technique [0002] DCS is the English abbreviation of Distributed Control System (Distributed Control System), also known as Distributed Control System in the domestic automatic control industry. There are a large number of continuous production and processing devices in petrochemical and other industries. In order to ensure the continuous operation of the devices, important parts of various dynamic equipment (including large units, fans, liquid delivery pumps, etc.) are controlled by the production process automation control system (DCS, SIS, etc.) etc.), the conventional method is to centrally send the DCS start-stop and interlock stop signals to the MCC (Motor Control Center, MOTOR CONTROL CENTER) indoor terminal cabinet through the control cable, and the terminal cabinet is then respectively ...

AI Technical Summary

Problems solved by technology

[0005] (1) The DCS command is only used as a transmission bridge, there is no record of the state change time of the DCS command, and no basis is provided for the MCC maintenance personnel to analyze the motor failure stop, prolonging the fault analysis and processing time;

[0006] (2) The input and output of DCS commands and control signals are all in the "one-to-one" transmission mode, which requires remote connection of multi-core control cables. The farther the distance between the DCS command control room and the MCC, the greater the investment cost

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