West Control Solutions KS98-1 - Manual (Page 166)

III-9.5 VTREND ( trend display(No. 99) )
General
Function VTREND collects 125 values of the analog input ‘ x1‘ in a shift register and permits value display as a trend
curve. When the shift register is filled with 125 values, the value 125 samples ago is overwritten by a new value. With
input sample ‘
sample‘ not used, data recording is synchronous with the time units specified in the configuration.
Trigger pulses at the ‘ sample‘ input permit asynchronous data recording.
The properties of KS98-1 function block VTREND are:
w The resolution of the KS98-1 Y axis is 60 pixels.
w The resolution of the X axis is 125 pixels.
w With further trend blocks connected at the output of a trend block (cascade), these blocks can be viewed by shift -
ing the time axis (scrolling the time axis).
w The Y resolution can be magnified by factor 4, and scrolling throughout the range is possible in steps of 12,5%.
The zero shift remains unchanged in the background when returning to normal resolution.
w The old settings also remain unchanged when leaving the operating page and calling it up again.
w The lower scanning time limit is set to 0,01 for unit hours.
w Output Bl-no provides the operating page block number.
5 accesses via the communication interface, each providing data packages of 25 trend data from KS 98-1, are available.
g
When connecting 2 trend blocks to one trend output by mistake in the case of a cascade, the one with the lower
number is ignored. The number of cascaded blocks is not limited.
g
If blocks in the chain have different scanning times or different ranges, data display is faulty. No warning is output.
The trend display continues when scrolling in the time axis (paging into the past) rather than being stopped.
g With voltage failure, the sampled values remain unchanged.
+ The changing of the texts displayed, is only possible in the engineering-tool! Max. 16 digits can be entered for every
textparameter.
9499-040-82711 Visualization
VTREND ( trend display(No. 99) ) III-166
VTREND
X-125
Bl-no
ready
X 1
hi
de
di
s
abl
re
se
t
sa
m
p
le
104 ts=11
Unit
Sample
sample
disabl
reset
hide
. . .
98 99
100
1 2 3 4
X 0
X 100
Dp1
A.A
X1
X-125
ready
Zoom
Bl-no