User manual

Using SIMATIC PCS 7 OSx @aGlance1-14
SIMATIC PCS 7 OSx 4.1.1 @aGlance
Using the SIMATIC PCS 7 OSx @aGlance Functions (continued)
To retrieve a list of historical trend values interpolated across 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.
 Tag Names — designate the tag names for the requested data values.
 Attribute Names — designate the bit names or the attribute names for
the 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.
 Output Range — designate a location for the set of trend data.
 Starting Time — enter a character string with a maximum total length
of 21 characters to represent the starting point for the required
historical trend.
You can specify time using a number with one to six digits. The system
acceptsaoneortwodigitnumberashours;athreeorfourdigit
number as hours and minutes; and a five or six digit number as hours,
minutes, and seconds. A colon between fields is optional. If AM or PM
is not specified, the system defaults to a 24-hour clock. For examples,
see the “Getting Trend Data” portion of Section 1.4.
 Interval Time — enter a text string to represent the time interval
between samples of historical data.
Getting
Interpolated Trend
Data