User manual

Using SIMATIC PCS 7 OSx @aGlance1-12
SIMATIC PCS 7 OSx 4.1.1 @aGlance
Using the SIMATIC PCS 7 OSx @aGlance Functions (continued)
To retrieve a list of actual historical trend points for a time period, you must
first be logged in with your client login. Your client must provide the server
with the following parameters.
 Server Name — the prefix osx must appear in front of the OSx station
name.
 TagName—designatethetagnamefortherequesteddatavalues.
 AttributeName—designatethebitnameortheattributenameforthe
requested data values. For example, you can use a bit name such as
status.active o r status.1, or you can use the status attribute alone. If
you specify an attribute name, @aGlance attempts to retrieve analog
trend data. If you specify a bit name, @aGlance attempts to retrieve
digital trend data.
The text following the dot is the bit name. The number following the
dot is a number from 1 to 16 corresponding to the bit number in the
status attribute. Refer to the chapter on defining tags in the SIMATIC
PCS 7 OSx Process Configuration Manual for more information about
bit names.
 Start Index (optional) — enter an integer. The server uses the index as
a placeholder when there is more data to return than there are output
locations. A value of zero directs the server to return values starting at
the beginning of its database.
 Output Range — designate a location for the set of trend data.
Getting Trend Data