unregister_point
unregister_point — stops echo and exception message sending.
Syntax
unregister_point (symbol)
Returns
t on success, or
nil on failure.
Description
This function causes the Cascade DataHub to immediately stop sending
echo and exception messages for the named point. It is possible
that exceptions and echos which are queued to the task will
arrive after this function is called, but the datahub will not
generate any new messages.
Example
Gamma> register_all_points(nil,t);
t
Gamma> b;
55
Gamma> unregister_point(#b);
t
Gamma> write_point(#b,33);
t
Gamma> write_point(#c,77);
t
Gamma> next_event();
nil
Gamma> b;
55
Gamma> c;
77
Gamma>
