User manual

Using SIMATIC PCS 7 OSx @aGlance1-18
SIMATIC PCS 7 OSx 4.1.1 @aGlance
Using the SIMATIC PCS 7 OSx @aGlance Functions (continued)
To establish a hot link that monitors a list or a table of tag:attribute data
values continuously, your client must issue function calls to initiate the hot
link, to retrieve the data, and to close the hot link. Refer to the user
documentation that accompanies your client software for more detailed
information about how to issue these functions.
Your client must provide the server with the following parameters in one or
more of the function calls.
 Server Name — the prefix osx must appear in front of the OSx station
name.
 Tag Names — designate the tag names for the requested data values.
 Attribute Names — designate the attribute names for the requested
data values.
 Output — designate a location for the list of data values.
 List Counts — enter an integer to represent the number of tag names,
the number of attribute names, the number of values requested, and
error information. These lists must all be the same size.
 Error Information — designate a location to display error messages.
 Monitor_Type — designates whether monitoring will be done by polling
or by event. A non-null value indicates polling.
 Monitor_ID — identifies the monitor request for the monitor cancel
function. A value of zero indicates that all monitoring is to be cancelled.
Monitoring Tag
Values (Hot Links)