Invalid Cast Exception ^{CODESYS Forge talk (Thread)}
Invalid Cast Exception
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LREAL from four WORDs? ^{CODESYS Forge talk (Thread)}
LREAL from four WORDs?
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LREAL benötigt ^{CODESYS Forge talk (Thread)}
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Expt Funktion für lreal??
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LREAL binary compatibility ^{CODESYS Forge talk (Thread)}
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function arguments and types/cast ^{CODESYS Forge talk (Thread)}
function arguments and types/cast
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Split int to int array? ^{CODESYS Forge talk (Thread)}
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Confusion with Lreal to dword ^{CODESYS Forge talk (Thread)}
Confusion with Lreal to dword
Last updated: 2013-12-30

LREAL support in target device ^{CODESYS Forge talk (Thread)}
LREAL support in target device
Last updated: 2019-08-07

explicit cast ENUM to UINT and vice versa ^{CODESYS Forge talk (Thread)}
explicit cast ENUM to UINT and vice versa
Last updated: 2021-03-11

64 Bit Wert in ein LREAL umwandeln ^{CODESYS Forge talk (Thread)}
64 Bit Wert in ein LREAL umwandeln
Last updated: 2016-09-21

Array of 5000 int ^{CODESYS Forge talk (Thread)}
Array of 5000 int
Last updated: 2017-08-16

String to INT / REAL ^{CODESYS Forge talk (Thread)}
String to INT / REAL
Last updated: 2017-12-03

Anzeige INT in Webvisu ^{CODESYS Forge talk (Thread)}
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Last updated: 2010-12-13

Dividing DINT/INT variables ^{CODESYS Forge talk (Thread)}
Dividing DINT/INT variables
Last updated: 2020-10-24

Convert INT to Binairy ^{CODESYS Forge talk (Thread)}
Convert INT to Binairy
Last updated: 2022-08-31

Convert WORD to INT ^{CODESYS Forge talk (Thread)}
Convert WORD to INT
Last updated: 2017-12-06

Post by mondinmr on Unexpected behavior in cyclic encoder read method during INT overflow (wrap-around) ^{CODESYS Forge talk (Post)}
Hi everyone, I’m investigating a potential issue with a cyclic method we use for reading incremental encoders in our libraries. I’ve come across two implementations that, at first glance, appear to perform the same operation: motionUnit.vlPositionActualValue is UINT due strange encoder type. Version A METHOD PROTECTED cyclicReadField VAR_INST actPosFieldOld: INT; rI: INT; delta: INT; END_VAR rI := TO_INT(motionUnit.vlPositionActualValue); delta := rI - actPosFieldOld; m_actPosRaw := m_actPosRaw + TO_LREAL(delta); actPosFieldOld := rI; IF settings.velocityFeebackMapped THEN m_actVelRaw := TO_LREAL(motionUnit.velocityActualValue); END_IF Version B METHOD PROTECTED cyclicReadField VAR_INST actPosFieldOld: INT; END_VAR m_actPosRaw := m_actPosRaw + TO_LREAL(TO_INT(motionUnit.vlPositionActualValue) - actPosFieldOld); actPosFieldOld := TO_INT(motionUnit.vlPositionActualValue); IF settings.velocityFeebackMapped THEN m_actVelRaw := TO_LREAL(motionUnit.velocityActualValue); END_IF Both use INT and the same delta logic, so they seem equivalent. However, when an overflow (wrap-around) occurs, version A continues correctly as expected, while version B unexpectedly resets to -32768 without a clear reason. Has anyone experienced similar behavior or can shed light on what might be happening here? It almost seems as if the cast to LREAL is being applied before the calculation — but that would be illogical and potentially very dangerous in many situations! Thanks!
Last updated: 2025-05-13

FUP: Verschaltungen Real, Int usw. ^{CODESYS Forge talk (Thread)}
FUP: Verschaltungen Real, Int usw.
Last updated: 2018-02-02

Data conversion INT to UDINt (double) ^{CODESYS Forge talk (Thread)}
Data conversion INT to UDINt (double)
Last updated: 2017-01-30

Konvertierung von String in INT Variable ^{CODESYS Forge talk (Thread)}
Konvertierung von String in INT Variable
Last updated: 2006-03-20

Überlauf einer INT-Variable abfangen ^{CODESYS Forge talk (Thread)}
Überlauf einer INT-Variable abfangen
Last updated: 2009-09-02

Deklaration eines 25Bit Int Wert ^{CODESYS Forge talk (Thread)}
Deklaration eines 25Bit Int Wert
Last updated: 2007-11-23

Int Variable mit 1 Kommastelle ^{CODESYS Forge talk (Thread)}
Int Variable mit 1 Kommastelle
Last updated: 2011-01-23

Convert 2 INT to Real ^{CODESYS Forge talk (Thread)}
Convert 2 INT to Real
Last updated: 2021-08-15

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