Giovani
2004-11-03 14:23:59 UTC
I,m having some difficulty trying to understand the following:
The manuals I´ve read tell that to use the Read Tag.vi it´s not
necessary to previously start the Tag Engine using the Engine
Launch.vi.
But, when I try to read the value of a discrete tag using the Read
Tag.vi, the error output turns on. Because of this I decided to start
the Tag Engine usung the Engine Launch.vi before reading the tag but,
to my dismay, the error persisted.
Seeing this happen make me start to think that the problem was that
the engine hasn´t yet initialized when the Read Tag.vi ran; so, I
decided to wait an certain amount of time - in this case, 4000 ms
would suffice - before reading the tag value and, with this, no error
occurred. Could anyone pelease tell me if my assumption is correct ?
If not, why is this happening ?
PS :
It´s necessary to wait the time interval just the first time the tag
is read. Afterward, no errors occur.
The manuals I´ve read tell that to use the Read Tag.vi it´s not
necessary to previously start the Tag Engine using the Engine
Launch.vi.
But, when I try to read the value of a discrete tag using the Read
Tag.vi, the error output turns on. Because of this I decided to start
the Tag Engine usung the Engine Launch.vi before reading the tag but,
to my dismay, the error persisted.
Seeing this happen make me start to think that the problem was that
the engine hasn´t yet initialized when the Read Tag.vi ran; so, I
decided to wait an certain amount of time - in this case, 4000 ms
would suffice - before reading the tag value and, with this, no error
occurred. Could anyone pelease tell me if my assumption is correct ?
If not, why is this happening ?
PS :
It´s necessary to wait the time interval just the first time the tag
is read. Afterward, no errors occur.