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PLC高速数据采集分析系统 ─ 详尽解析质量管理及工业大数据来源 |
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GE Fanuc、阿尔斯通HPCi为代表的多种PLC支持EGD通讯。采样周期可到2ms。 以GE公司PACSystems PLC为例，安装ME编程软件。
新建工程项目，Target1右键->属性选择与PLC的联机方式。
在主程序中调用PDA相关的子程序。
PLC中PDA程序例子。
增加EGD通讯单元。
PDA服务器可接收多台PLC的多个生产者的数据，一台PLC中也可以有多个生产者，按"Exchange ID"识别，一台PDA服务器还可设置多个IP地址。 建立第1个生产者PDA1，扫描时间4ms。
传送4个REAL、4个INT、16个BIT。
建立第2个生产者PDA2，扫描时间10ms。
传送350个REAL，可以是数组，数组便于预留备用点。EGD最多支持1400个字节。
PDA组态Config.csv如下，数据源类型为26，PLC和PDA中都不需进行字节交换，PLC中BOOL型可打包成WORD发送，不要打包成BYTE。 [1000,24CH,4.000ms,192.168.0.210,26,PDA1,192.168.0.216] No, Name,Adr/note,Unit,Len,Offset ,Gain ,Type,ALM, CH1=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH2=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH3=, , , ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH4=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH5=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH6=, , , ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH7=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH8=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH9=, , , ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH10=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH11=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH12=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH13=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH14=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH15=, ,
, ,1
,0.000000,1.000000,BIT ,0
,0.000,0.000,0.000,0.000,0
CH16=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH17=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH18=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH19=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH20=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH21=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH22=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH23=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 CH24=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 [2000,350CH,4.000ms,192.168.0.210,26,PDA2,192.168.0.216] No,
Name,Adr/note,Unit,Len,Offset
,Gain
,Type,ALM, CH1=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH2=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH3=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH4=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH5=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH6=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 …… CH345=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH346=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH347=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH348=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH349=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH350=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 PAC停电后，如果程序意外丢失，造成下载程序困难，可将除电源、CPU外的模块全部拔除，PC与PAC用以太网线直连下载。让CPU处于停止状态可下载硬件组态。EGD的Exchange ID在默认值附近修改，否则可能会造成Profibus-DP通讯异常。 将BOOL型变量定义在寄存器的某一位上。
建议将要采集的每个数据类型定义一个数组如REAL300，BOOL1600等，EGD组态时用该数组，便于改变采集的变量时保持EGD组态不变，这样不必重启PLC，符号变量在ST程序中直接给数组单元赋值，地址变量在梯形图中用MOVE块赋值。
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设备测试 故障诊断 质量分析 |
毫秒级的数据采样 高效实时数据压缩 捕捉信号瞬时突变 |
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