modbus {
    # 通信参数
    transport rtu {
        port /dev/ttyUSB0;
        baudrate 9600;
        parity none;
        stopbits 1;
        timeout 1s;
    }

    # 或TCP配置
    #transport tcp {
    #    host 192.168.1.100;
    #    port 502;
    #    timeout 500ms;
    #}

    # 日志设置
    error_log /var/log/modbus_error.log;
    access_log /var/log/modbus_access.log;
}

device_io t1 {
   # 轮询间隔
   poll_interval 5s;

   # 重试策略
   retries 3;
   retry_timeout 2s;

   # 数据点定义
   metrics {
       # 温度读取(保持寄存器)
       temperature {
           address 40001;  # Modbus地址表示法
           type int16;
           scale 0.1;
           unit "°C";
       }

       # 压力传感器(输入寄存器)
       pressure {
           address 30001;
           type uint16;
           scale 0.01;
           unit "kPa";
       }
   }

   # 写入控制
   controls {
       # 启停控制
       power_switch {
           address 00010;
           type bool;
           safe_value off;
       }

       # PID设定值
       pid_setpoint {
           address 40010;
           type float32;
           min 0.0;
           max 100.0;
           precision 0.1;
       }
   }

}

device boiler_controller {
    # 设备标识
    slave_id 1;
    model "Siemens S7-1200";
    description "Main boiler controller";

    device_io t1;

    # 写入控制
    controls {
        # 启停控制
        power_switch {
            address 00010;
            type bool;
            safe_value off;
        }

        # PID设定值
        pid_setpoint {
            address 40010;
            type float32;
            min 0.0;
            max 100.0;
            precision 0.1;
        }
    }
}

device xyz {
    # 设备标识
    slave_id 1;
    model "Siemens S7-1200";
    description "Main boiler controller";

    # 轮询间隔
    poll_interval 5s;

    # 重试策略
    retries 3;
    retry_timeout 2s;

    # 数据点定义
    metrics {
        # 温度读取(保持寄存器)
        temperature {
            address 40001;  # Modbus地址表示法
            type int16;
            scale 0.1;
            unit "°  C";
        }

        # 压力传感器(输入寄存器)
        pressure {
            address 30001;
            type uint16;
            scale 0.01;
            unit "kPa";
        }

        # 状态位(线圈)
        #alarm_status {
        #    address 00001;
        #    type bool;
        #    bits {
        #        0 "overheat";
        #        1 "low_pressure";
        #        2 "pump_failure";
        #    }
        #    poll on;
        #}
    }

    # 写入控制
    controls {
        # 启停控制
        power_switch {
            address 00010;
            type bool;
            safe_value off;
        }

        # PID设定值
        pid_setpoint {
            address 40010;
            type float32;
            min 0.0;
            max 100.0;
            precision 0.1;
        }
    }
}

alarm high_temperature {
    # 触发条件
    condition $boiler_controller.temperature > 90.0;

    # 持续判定
    hold_time 30s;
}