How to control through opc data access explorer

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Luong Tu
Luong Tu 2016-4-23
评论： Samuel Vergara 2016-7-3
I can not use opc data as a button to capture image, my code is:
da = opcda('localhost', 'KEPware.KEPServerEx.V4');
connect(da);
grp = addgroup(da);
itm1 = additem(grp, 'Channel1.Device1.Group1.capture');
data = read(itm1,'device');
opcdata= data.Value;
if (opcdata==1)
opcdata=0;
vid=handles.vid;
pause(3);
data=getsnapshot(vid);
imshow(data);
savename = strcat('Desktop' ,'hinh', '.jpg');
imwrite(data,savename);
  2 个评论
Samuel Vergara
Samuel Vergara 2016-7-3
You got some error that can share? The only thing that I do is use the connect after the item adition, but I'm not sure if it's the solution.
da = opcda('localhost', 'KEPware.KEPServerEx.V4');
grp = addgroup(da);
itm1 = additem(grp, 'Channel1.Device1.Group1.capture');
connect(da);

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