KomUniVal structure (contains a new value).
Pointer to a Boolean value of the request attribute of the function
The function WritePointValue (_WritePointValue@16 in the Stdcall calling
convention) is optional and called to write a new value into defined output
I/O tag. After successful writing, the I/O tag will
change into the
status Transient (see the item Status in KomUniValstructure). The I/O
tag will change back to the normal status (InLimit, ...) after the backward
reading a value from the device. If a user requires the backward reading
(calling the function
it is necessary to write a non-zero value to into the parameter RdBack
(if the parameter is zero, then calling the function
Request executed OK.
An error occurred (a device does not communicate or is
out of service, or there is any
error), the station changes into the status COM_ERR or HARD_ERR after
returning from the function.
The function was ignored and the station status is not changed.