Equipment monitoring apparatus supporting single connection and realizing method thereof

Abstract

The invention discloses an equipment monitoring apparatus supporting single connection and a realizing method thereof. The equipment monitoring apparatus supporting single connection comprises a main process database and a backup process database, wherein the main process database is connected with a main I / O driving agent device, the main I / O driving agent device is connected with a main pre-positioning I / O driving device, the backup process database is connected with a backup I / O driving agent device, and the backup I / O driving agent device is connected with a backup pre-positioning I / O driving device. The main pre-positioning I / O driving agent device and the backup I / O driving agent device can be connected with external-connected equipment, and a signal checker is connected between the main pre-positioning I / O driving agent device and the backup pre-positioning I / O driving agent device. The invention keeps the equivalent mode of the process database and can completely support the equipment of single connection without modifying the layer of the process database.

Description

technical field [0001] The invention relates to a monitoring device and a realization method thereof, in particular to a device for collecting data from a process database of a monitoring system and a realization method thereof. Background technique [0002] Various devices may be connected to the general integrated monitoring platform. Although there are many devices that can support multiple connections at the same time to obtain data from the device and send control instructions, such as most PLCs; but there are also many For non-standard devices, the communication method and communication protocol used do not support two connections to access the device at the same time. [0003] There are many types of redundant backup schemes for the monitoring system. The most commonly used hot standby redundant mode in the current monitoring system is the peer-to-peer mode, such as figure 1 As shown, there are two or more identical nodes running at the same time; the core of the mon...

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Problems solved by technology

[0004] When the device does not support dual-link connection, there is a problem with the above solution. After adding a single-connection device, when the device supports one connection and does not support the second connection, the process database where the latter connection is located will not be available. Data, redundant design failure; if the device detects a new connection and cuts off the previous connection, it will cause the connection with the device to be switched continuously, resulting in the failure of the two process databases to obtain data smoothly, seriously affecting the monitoring performance and stability

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