Siemens CU230P-2 HVAC Parameter Manual page 547

PLI 0 X-coordinate
-340.28235E36 ... 340.28235E36
p20374 (0.0000)
PLI 0 input X
p20372
(0)
PLI 0 Y-coordinate
-340.28235E36 ... 340.28235E36
p20375 (0.0000)
PLI 1 X-coordinate
-340.28235E36 ... 340.28235E36
p20380 (0.0000)
PLI 1 input X
p20378
(0)
PLI 1 Y-coordinate
-340.28235E36 ... 340.28235E36
p20381 (0.0000)
1 2
Arithmetic function blocks
PLI (scaling polyline)
PLI 0
PLI 0 RTG
5 ... 9999
p20376 (9999)
Breakpoint 0 (A0/B0 = p20374[0]/p20375[0]) ... Breakpoint 19 (A19/B19 = p20374[19]/p20375[19])
A18/B18
Y
A19/B19
X Y
Xn
X
A0/B0
Yn
A1/B1
PLI 0 RunSeq
0 ... 32000
p20377 (980)
PLI 1
PLI 1 RTG
5 ... 9999
p20382 (9999)
Breakpoint 0 (A0/B0 = p20380[0]/p20381[0]) ... Breakpoint 19 (A19/B19 = p20380[19]/p20381[19])
A18/B18
Y
A19/B19
X Y
Xn
X
A0/B0
Note:
Yn
A1/B1 This function block randomly adapts output variable Y to input variable X by means of up to 20 breakpoints in 4
quadrants.
Interpolation is carried out linearly between the breakpoints. Outlying the area A0 to A19, the characteristic curve runs horizontally.
During configuration, you must ensure that the values of A0 to A19 are arranged in ascending order. Otherwise the
PLI 1 RunSeq
values at the output will not be correct. The values B0 to B19 can be selected at random, i.e., independently of the
0 ... 32000
previous value.
p20383 (990)
If breakpoints are not needed (e.g., A16/B16 and higher), the following values of the X- and Y-coordinates (A16/B16 to
A19/B19) must be assigned the same values as A15/B15.
3 4
PLI 0 output Y
r20373
PLI 1 output Y
r20379
5 6
FP_7226_97_51.vsd
29.10.2009
7
Function diagram
G120 CU230P-2
V4.3
8
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