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package com.example.pdaplccontrol;
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final class PlcConfig {
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// 参数集中放置，现场地址变化时只改这里。
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static final String PLC_IP = "192.168.11.1";
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static final int RACK = 0;
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static final int SLOT = 1;
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static final int DB_NUMBER = 49;
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static final int LINE_NUMBER_OFFSET = 32;
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static final int WEIGHT_KG_OFFSET = 34;
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static final int WORD_BYTE_LENGTH = 2;
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static final int MONITOR_START_OFFSET = LINE_NUMBER_OFFSET;
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static final int MONITOR_BYTE_LENGTH = WEIGHT_KG_OFFSET + WORD_BYTE_LENGTH - MONITOR_START_OFFSET;
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// 监控常规轮询间隔（5000毫秒）。设为 5 秒是为了降低 PDA 与 PLC 的网络交互负荷。
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static final int MONITOR_INTERVAL_MILLIS = 5000;
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// 监控发生第一次读取失败时的退避重试延迟（2000毫秒）。初次失败快速重试，以规避偶发抖动。
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static final int MONITOR_FIRST_FAILURE_RETRY_MILLIS = 2000;
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// 监控发生第二次读取失败时的退避重试延迟（3000毫秒）。
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static final int MONITOR_SECOND_FAILURE_RETRY_MILLIS = 3000;
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// 监控发生多次连续失败时的最大退避延迟（5000毫秒）。防止网络彻底断开时高频请求占用设备连接资源。
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static final int MONITOR_MAX_FAILURE_RETRY_MILLIS = 5000;
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// 判定通讯异常的连续失败次数阈值。达到 3 次失败才报错，避免网络偶发丢包导致界面闪红。
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static final int MONITOR_FAILURE_THRESHOLD = 3;
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// 判定通讯数据失效的兜底时间阈值（15秒）。用于防止由于其他原因导致的监控界面数据僵死、长期未刷新的情况。
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static final long MONITOR_STALE_THRESHOLD_MILLIS = 15000L;
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static final int MIN_LINE_NUMBER = 10;
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static final int MAX_LINE_NUMBER = 18;
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static final int MIN_WEIGHT_KG = 0;
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static final int MAX_WEIGHT_KG = 30;
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private PlcConfig() {
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}
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}
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