IEC (integrated Ethernet chip) 104 communication host-standby switching method under high redundancy configuration
An IEC104, active-standby switching technology, applied in the direction of digital transmission system, electrical components, error prevention, etc., can solve the problems of low redundancy, unable to meet the stability and reliability requirements of large-scale hydropower station monitoring system, etc., to ensure consistency , The effect of preventing the wrong switching of control rights
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[0031] An IEC104 communication active / standby switchover method under high redundancy configuration, involving two servers as the monitoring system of the master station and two host computers as the remote control device of the slave station, consisting of the following methods:
[0032] 1) The first and second monitoring system servers of the monitoring system are divided into main machine and standby machine. The four ports of the two machines are respectively named A1, A2, B1, and B2. Among them, one is the main port, that is, the one with the control right ports; the remaining three are standby ports, that is, ports that do not have control rights; the four ports are equal, and the sequence of control rights switching is A1, A2, B1, B2, A1, A2..., forming a logical ring.
[0033] 2) Monitoring system port disconnection detection: The monitoring system sends a test frame to the telecontrol device every 500ms, and if the test frame is answered, it means that the port is norm...
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