cread
cread — creates
and reads a point.
Arguments
- name
- The name of the point.
Returns
The complete point definition in a
message, with this syntax:
(point name type value [conf security locked seconds nanoseconds flags quality])
where:
- name
- The name of the point.
- type
- The data type of the point, one of integer, floating
point, or character string.
- value
- The value of the point.
- conf
- The confidence level of the point,
0 - 100 percent,
unused by most applications.
- security
- The security level of the point, 0
to 32768, where higher numbers represent
higher security.
- locked
- 0 for locked, or 1 for unlocked.
- seconds
- The operating system time in seconds when the point was read.
- nanoseconds
- The number of nanoseconds after
seconds when the point was
read.
- flags
- User-defined flags.
- quality
- A constant representing a quality of the connection,
assigned by the DataHub for this point, such as
Good, Bad,
Last known, Local
override, etc. The possible values are those
supported by OPC in Microsoft Windows.
Description
This command creates a point and
then reads the information it contains. See also read.
