User Manual
Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function DPP 2-107
At the prompt "
Minimum
" it is possible to set either absolute or relative time units not
only for the x axis, but also for the y-axis.
For relative time units, an absolute point in time is calculated upon the output of the
graphic (GRAF,PLOT) that is taken relative to the current time.
X-Axis ..
Minimum=19.07.1996 14:36: ?
(-100..-1) (Min.,Hour,Day) : relative time units (e.g., -3hours)
(dd.mm.yyyy) (hh:mm) : absolute date with abs. time
(dd.mm.yyyy) : absolute date
(hh:mm) : absolute time
(-1E+30..1E+30): : counter value
Units per cm.=10 : ?
(1..100)(Min.,Hour,Day) : relative time units?
(.001..1E+30): : counter values
Scaling the x-axis
Scaling of the Axes
-------------------
X-Axis ..
Minimum=19.07.1996 14:47: 3
Units per cm.=10 : 12
In the above example, the minimum (origin) of the x axis of "13:06" is the primary
lettering and "23.4.96" is secondary lettering.
13:06 13:30 13:54
26.7.89
9370Z09E
Minimum
(origin)
12 mins/cm
X axis
Time Markers
Date Markers
The X-direction is taken as a time axis in many cases. Therefore, X-axis scaling
involves defining a time span over which the desired parameter is to be plotted.
For lettering a time axis, a format is automatically chosen which corresponds to the
range at hand. The lettering consists of primary lettering directly at the axis and
secondary lettering 5 mm below the primary lettering.
Covers time spans of less than 48 hours. The axes are then lettered in
time format
(hh:mm) (primary lettering).
For the minimum and at date changes, the date is shown 5 mm below the time as a
secondary lettering in the (dd.mm.yy) format.
If the range is larger than two days, then the axes are automatically lettered in
days
format
(dd) and the unit per cm set to 1 day.
For the minimum and at date changes, the date is shown 5 mm below the time as a
secondary lettering in the (dd.mm.yy) format.
Month and year (mm.yy) are shown as secondary lettering below the day for minimum
and at a change in the month.
Relative time units
Lettering
Time span < 2 days
Time span > 2 days