Parameter Discrepancy Time Ix & Ix+1 - WAGO 750-666/000-003 Manual

WAGO-I/O-SYSTEM 750
750-666/000-003 4FDI/2FDO 24V/10A PROFIsafe V2 iPar
• Input pair 1: digital input I1 & I2
• Input pair 2: digital input I3 & I4
You can set the value of the Dual channel evaluation parameter for each input
pair separately.
If the Dual channel evaluation is set to "yes", then the Short circuit test
parameter must be the same!
If you have set the Dual channel evaluation parameter to "yes" for two digital
inputs, then you have to set the value of the Short circuit test parameter to the
same for both digital inputs concerned. The PROFIsafe I/O module checks your
setting after transferring to the I/O module and makes automatic corrections if
necessary by setting the value to "active" for both digital inputs. The automatic
correction is displayed in the WAGO parameterization tool. You can set the
values of both digital inputs to the same value after the automatic correction is
made.
7.4.5.4 Parameter Discrepancy Time Ix & Ix+1
Do not use discrepancy time monitoring as part of the safety function!
You may only use discrepancy monitoring for safety applications where
monitoring of both contacts does not represent its own safety function, such as
emergency Off and, in contrast to this, two-hand control!
The discrepancy time parameter is used for two-channel analysis of two digital
inputs Ix & Ix+1. The discrepancy time is then only used by the PROFIsafe I/O
module when the operating mode is set to "Standard" and the value of the two-
channel analysis parameter is set to "yes".
If you have set the two-channel analysis parameter to "yes", the signal states of
the affected input pair are evaluated based on an variable valence rule. The
valence rule (antivalence, equivalence) depends on the value of the valence
analysis parameter (see Section "Valence Analysis Ix & Ix+1 Parameter").
The PROFIsafe I/O module checks whether the deviation from the valence rule
has disappeared after the configured discrepancy time has elapsed. In not, there is
a discrepancy error. The PROFIsafe I/O module is passivated and the
"Discrepancy time exceeded" diagnostic message is output to the safe PLC.
Use the value of the parameter to specify the maximum permissible time for a
deviation (invalid signal state) of both input signal states of the valence rule.
The PROFIsafe I/O module begins discrepancy monitoring as soon as a deviation
of the input signal states from the valence rule is detected.
Manual
Version 1.2.0, valid from HW/SW Version 01/01
Commissioning 105