Trends4-8 SIMATIC PCS 7 OSx 4.1.2 Operator
Displaying Trend Data (continued)
Trend displays enable the operator to change the time base or range. The
change is not permanent and only alters the time base or scale temporarily
for the current display. When the operator selects the
Change Time or Change
Range
target, a command form appears in the lower left part of the screen
(Figure 4-5). This form enables the operator to alter the values of the X axis
(time) or Y axis (range).
OK enters the new value and dismisses the
command form,
Apply enters the new value but leaves the form up, and
Cancel dismisses the command form with no changes.
Changing Time for Real-Time Trends
Changing Time
for Historical
Trends
Changing Range
OK
Apply
Cancel
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Figure 4-5 Time/Range Selection for Trends
Changing the Time
Base or Range