Collecting data from the opc server

2015 12 10
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更新时间：2021 8 20
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How can I collect all data from the opc server? I open elements one by one and it's not convenient to me:
grp = addgroup(da);
itm1 = additem(grp, 'LINE.currentAn');
r = read(itm1, 'device');
currentAn=r.Value;
itm1 = additem(grp, 'LINE.currentBn');
r = read(itm1, 'device');
currentBn=r.Value;
itm1 = additem(grp, 'LINE.currentCn');
r = read(itm1, 'device');
currentCn=r.Value;
etc...

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