makepublic - Convert private group into public group
Syntax
makepublic(GObj)
Description
makepublic(GObj) makes the dagroup object GObj public.
Public groups allow you to share data configuration information across
multiple OPC clients. Use the GroupType property
to check whether a group is public.
Public groups on a server cannot have the same name. If you
attempt to call makepublic on a private group with
the same name as an existing public group, you get an error.
After you make a group public, you cannot add items to that
group or delete items from that group. You must ensure that a group
contains the required items before making the group public.
Not all OPC data access servers support public groups. If you
try to make a public group on a server that does not support public
groups, you get an error. To verify that a server supports public
groups, use the opcserverinfo function
on the client connected to that server: Look for an entry 'IOPCPublicGroups' in
the 'SupportedInterfaces' field.
Use the clonegroup function to create a private
group from a public group.
Examples
Create a group on a local server and make the group public:
da = opcda('localhost', 'Dummy.Server');
connect(da);
grp = addgroup(da, 'MakepublicEx');
itm1 = additem(grp, 'Device1.Item1');
itm2 = additem(grp, 'Device1.Item2');
makepublic(grp);
See Also
clonegroup | opcserverinfo
 | load | | obj2mfile |  |
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