Lenze EVS9332xK - Manual (Page 153)

Function library
Function blocks
3.2.34 Conversion (CONVPHPHD2)
3−125
l
EDSVS9332K−EXT EN 4.0
(
STOP!
The function block can evaluate signal jumps at the input CONVPHPHD2−IN up to
max. 2147483647 inc (2
31 −1). At higher signal jumps the sign of the output signal
changes.
A position loss occurs which cannot be compensated anymore. You must carry out
a reset (CONVPHPHD2−RESET = HIGH).
0
1 -1
2 147 483 647 (2 -1) 31
-2 147 483 648 (-2 ) 31
-2 147 483 647 (-2 +1) 31
1073741824 (2 /2) 31 -1073741824 (-2 /2) 31
Fig. 3−94 32−bit data representation in the cycle of numbers
Example 1 1. The input signal at CONVPHPHD2−IN is 65536 inc.
2. Now it jumps to −65536 inc.
3. The output CONVPHPHD2−OUT outputs, as expected, negative values
Example 2 1. The input signal at CONVPHPHD2−IN is 65536 inc.
2. Now it jumps to −2
31 −1 inc.
3. The output CONVPHPHD2−OUT, however, outputs positive values