PRS-7910
22 PRS-7910
ļ Other systems
The monitoring system of wind power station and photovoltaic power plant.
8.4 Event Recording
8.4.1 Overview
The device can store the latest 1024 supervision events, 1024 IO events, 1024 device logs, 256
control logs and 256 regulation logs. All the records are stored in non-volatile memory, and when
the available space is exhausted, the latest one will automatically overwrite the oldest record.
8.4.2 Device Supervision Events
The device is under automatic supervision all the time. If there is any failure or abnormal condition
detected (e.g. VT circuit failure), it will be stored and displayed.
8.4.3 Binary Status Change Events
When a binary input is energized or de-energized, i.e., its state has changed from "0" to "1" or from
"1" to "0", it will be stored and displayed.
8.4.4 Device Logs
If an operator implements some operations on the device, such as reboot device, modify setting,
etc., they will be stored and displayed.
8.4.5 Switch Control Logs
The total sequence of each attempt of control command will be stored and displayed, including
object, source, remote/local mode, interlock condition, command (selection/execution, open/close,
up/down) and result.
8.4.6 DC Regulation Logs
The total sequence of each attempt of regulation command will be stored and displayed, including
object, source, remote/local mode, command (selection/execution), value and result.
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