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Switch output module of dcs system

A technology of switching value output and DCS system, which is applied in general control systems, control/regulation systems, simulators, etc., and can solve complex problems that cannot be dealt with in time

Active Publication Date: 2018-06-15
CHONGQING CHUANYI AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, either the problem cannot be dealt with in time, or it is more complicated

Method used

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  • Switch output module of dcs system
  • Switch output module of dcs system

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Embodiment Construction

[0012] see figure 1 , a switch output module of a DCS system, including a power supply, a CPU module, a power-on delay circuit, a communication circuit and a digital output channel circuit, the power supply is used to supply power to the entire switch output module, and the CPU module It is used to communicate with the control station of the DCS system through the communication circuit and receive the control signal of the control station of the DCS system. A communication circuit is a circuit that communicates. Through it, the CPU can communicate with other smart products. Its core is the communication chip used, such as SP485 and so on. It is connected to the 485 bus outside and the isolation circuit on the other side. The CPU module is used to output control signals to the digital output channel circuit, and is used to control the digital output channel circuit to output switching signals to field devices. The CPU module can output corresponding signals according to the...

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Abstract

The invention discloses a switching quantity output module of a DCS. The switching quantity output module comprises a power supply source, a CPU module, a power-on delay circuit, a communication circuit and a digital quantity output channel circuit, wherein the power supply source is used for supplying power to the whole switching quantity output module, the CPU module is used for communicating with a control station of the DCS through the communication circuit, the CPU module is used for outputting control signals to the digital quantity output channel circuit and controlling the digital quantity output channel circuit to output switching quantity signals to onsite equipment, and the power-on delay circuit is used for receiving rest signals and delaying power supply to the digital quantity output channel circuit. The switching quantity output module of the DCS can record a state before resetting and can maintain an output state after the resetting consistent with the state before the resetting.

Description

technical field [0001] The invention relates to the field of DCS control systems, in particular to a switch output module of the DCS system. Background technique [0002] In the DCS control system, the use of DO switch output modules is very popular. In the field, it is often encountered that due to some special circumstances, the module needs to be powered on for reset, such as the module is broken, and the module needs to be replaced online, or the power supply module is damaged in the application without power supply redundancy system, or the industrial voltage is too low for a period of time and the power supply The module stops working, waits for it to work again after it returns to normal, and so on. Because the moment the module is reset, in general, the output channel is faster than the CPU, that is to say, when the CPU has not completed the initialization, the output channel has already output value, making the output status uncertain after reset, resulting in chao...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25232
Inventor 潘云川文利
Owner CHONGQING CHUANYI AUTOMATION
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