报警与条件
概述
OPC UA Part 9 在 ConditionType / AlarmConditionType 上定义了固定 NodeId 的标准 Method。SDK 封装为形参清晰的 C++ 方法。
| Method | NodeId | 入参 |
|---|---|---|
| Acknowledge | i=9111 | (event_id: vector<uint8_t>, comment: string) |
| Confirm | i=9113 | (event_id, comment) |
| AddComment | i=9029 | (event_id, comment) |
| Enable | i=2803 | — |
| Disable | i=2805 | — |
| ConditionRefresh | i=3875 | (subscription_id) |
| ConditionRefresh2 | i=12912 | (subscription_id, monitored_item_id) |
| OneShotShelve | i=9211 | — |
| TimedShelve | i=9213 | (shelving_time_ms) |
| Unshelve | i=9215 | — |
API
| 方法 | 类别 | 读写 | 说明 |
|---|---|---|---|
| ua.Acknowledge(condition_id, event_id, comment) | 报警 | 写 | 用户已知 |
| ua.Confirm(condition_id, event_id, comment) | 报警 | 写 | 现场已处理 |
| ua.AddComment(condition_id, event_id, comment) | 报警 | 写 | 加备注 |
| ua.EnableCondition(condition_id) | 报警 | 写 | 启用 |
| ua.DisableCondition(condition_id) | 报警 | 写 | 禁用 |
| ua.ConditionRefresh(sub_id) | 报警 | 写 | 补发激活报警 |
| ua.ConditionRefresh2(sub_id, mi_id) | 报警 | 写 | 仅指定 MI |
| ua.OneShotShelve(shelving_state_id) | 报警 | 写 | 一次性屏蔽 |
| ua.TimedShelve(shelving_state_id, ms) | 报警 | 写 | 限时屏蔽 |
| ua.Unshelve(shelving_state_id) | 报警 | 写 | 取消屏蔽 |
返回 StatusCode, 失败不抛异常。
代码示例
#include <darra/opcua.h>
using namespace darra::opcua;
DarraOpcUa ua("opc.tcp://server:4840");
ua.Connect();
auto sub = ua.CreateSubscription(500);
auto ev = sub->SubscribeEvents("i=2253"); // ServerObject
ev->OnEventArrived([&](const EventArrivedEventArgs& e) {
auto event_id = e.GetField("EventId").AsByteString();
auto condition_id = e.GetField("ConditionId").AsString();
// a. 让服务端补发当前激活报警
ua.ConditionRefresh(sub->SubscriptionId());
// b. 用户点 "确认"
auto rc = ua.Acknowledge(condition_id, event_id, "操作员已知");
if (rc != StatusCode::Good) std::cerr << "Acknowledge 失败: " << rc << "\n";
// c. 现场处理
ua.Confirm(condition_id, event_id, "现场已处理");
// d. 临时屏蔽 30 秒
ua.TimedShelve(condition_id + ".ShelvingState", 30000.0);
});
错误处理
| StatusCode | 含义 |
|---|---|
| Good | 成功 |
| BadEventIdUnknown | EventId 不匹配 |
| BadConditionAlreadyEnabled | 已启用 |
| BadConditionAlreadyShelved | 已屏蔽 |
最佳实践
- 首次订阅后必调 ConditionRefresh
- Acknowledge 后再 Confirm, 两步
- TimedShelve 单位 ms, 不是秒
- 不要在 OnEventArrived 里同步 ack, 推队列后台处理
跨语言对照
| C# | Python | Java | C++ | Rust | C |
|---|---|---|---|---|---|
| Acknowledge | acknowledge | acknowledge | Acknowledge | acknowledge | DarraUa_Condition_Acknowledge |
| Confirm | confirm | confirm | Confirm | confirm | DarraUa_Condition_Confirm |
| ConditionRefresh | condition_refresh | conditionRefresh | ConditionRefresh | condition_refresh | DarraUa_Condition_Refresh |