【快速入门教程】了解EG8200边缘计算网关如何进行开关量输入

【快速入门教程】了解EG8200边缘计算网关如何进行开关量输入

2024-04-24 14:56:17 阅读：发布人：纵横智控

概述

EG8200边缘计算网关自带2路开关量输入接口，支持检测NPN(包括干接点)和PNP。默认支持NPN模式，如需要PNP，请在采购时向客服说明。

当开关量输入节点检测到DI接口的信号有变化时，会主动输出1/0来表示当前DI接口的状态。

输入

#无输入口

输出

msg.payload
#   1：DI检测到高电平      0：DI检测到低电平

功能

1. 定时刷新状态

开关量输入节点会根据设置的时间，周期性的刷新当前的DI状态。存储在全局变量“DI_X”中，X为DI的通道号。当然，即使不设置定时刷新，DI如果发生状态变化也会主动更新“DI_X”。

2. 全局变量

在函数计算如果需要获DI的当前状态，可以使用以下语法获取：

获取全局变量：

global.get("DI_1")
#注意1:流程内至少存在一个开关量输入节点，才会使能开关量输入的全局变量，才能读取
#注意2:如果已经初始化了全局变量，重启网关才能删除全局变量

全局变量可以很直观的在右侧全局变量窗口查看：

边缘计算网关/物联网平台/网关模块/纵横智控

示例

手动改变DI1口接近开关传感器的状态，观察结果。同时通过函数计算节点读取全局变量：

边缘计算网关/物联网平台/网关模块/纵横智控

DI检测&读取全局变量

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