WAGO-I/O-SYSTEM 750 Commissioning 115750-666/000-003 4FDI/2FDO 24V/10A PROFIsafe V2 iParManualVersion 1.4.0, valid from HW/SW Version 01/01Pos: 47.16 /Serie 750 (WAGO-I/O-SYSTEM)/In Betrieb nehmen/Parametrieren mit WAGO-I/O-CHECK/Parametrieren 750-66x/Parameter Valenzauswertung 750-66x/000-003 (4 DI) @ 6\mod_1264755521865_21.docx @ 48922 @ 4 @ 18.3.4.5 Parameter Valence Evaluation Ix & Ix+1The Valence evaluation parameter is used for the dual channel evaluation of twodigital inputs Ix & Ix+1. The valence evaluation is then only used by thePROFIsafe I/O module if you have set the value of the Operating modeparameter to "Standard" and the value of the Dual channel evaluation parameterto "yes".The Valence evaluation parameter is used to set the valence rule of the dualchannel evaluation to be used for an input pair. You can set the parameter to"Antivalent" or "Equivalent". The valence evaluation can be set separately foreach input pair.Changing input signals caused by interferenceChanging input signals caused by interference can cause the PFOFIsafe I/Omodule to transmit the value "0" to the safe PLC in the process image for theinput pair affected, a discrepancy error to be detected after the discrepancy timehas elapsed and the "Discrepancy time exceeded" diagnostic message to beoutput.Possible causes may be:• Cross circuit, short circuit and broken cable (user error,wiring error)• Sticky normally open contacts of a reliable sensor• Inadequate filtering of the test signals of a reliable sensorIf you have set the Valence evaluation parameter to "Antivalent", then thePROFIsafe I/O module behaves as follows:The PROFIsafe I/O module compares the signal states of the digital inputsaffected to the opposing values. The following table shows the possible signalstates for the antivalent evaluation:Table 42: Antivalent EvaluationInputs Process ImageI2I4I1I3Bit 1Bit 3Bit 0Bit 2 Signal State0 0 0 0 Illegal0 1 0 1 1 Signal1 0 0 0 0 Signal1 1 0 0 IllegalAfter the set discrepancy time has elapsed, an illegal signal state leads to thedetection of a discrepancy error by which the PROFIsafe I/O module is passivatedand the "Discrepancy time exceeded" diagnostic message is output.If you have set the Valence evaluation parameter to "Equivalent", then thePROFIsafe I/O module behaves as follows:
