Table 31: Equivalent Pre-Evaluation - WAGO 8FDI 24V PROFIsafe 750-662/000-004 Manual

WAGO I/O System
750-662/000-004 8FDI 24V PROFIsafe
The F I/O module can be used to create four channel pairs from the eight digital
inputs:
• Channel pair 1: digital inputs I1 and I2
• Channel pair 2: digital inputs I3 and I4
• Channel pair 3: digital inputs I5 and I6
• Channel pair 4: digital inputs I7 and I8
You can set the value of the Pre-Evaluation parameter separately for each
channel pair.
With the "Equivalent" or "Antivalent" setting, the Short Circuit Test and
Input Filter Time parameters must be set to the same value
If you have set the Pre-Evaluation parameter to "Equivalent" or "Antivalent" for
two digital inputs, you must set the value of the Short Circuit Test and Input
Filter Time parameters to the same value for both digital inputs in question.
If you have set the Pre-Evaluation parameter to "Equivalent," the F I/O module
behaves as follows:
The F I/O module compares the signal states of the digital inputs in question to
the same values. The following table shows the possible signal states for
equivalent pre-evaluation:

Table 31: Equivalent Pre-Evaluation

Ix+1
0
0
1
1
After the amount of time specified in the Discrepancy Time setting has elapsed,
an invalid signal state causes a discrepancy error to be detected, which in turn
causes the channel pair in question to be passivated and the "Discrepancy Time
Exceeded" diagnostic message to be output; see section "Commissioning" > ... >
"Discrepancy Time Ix and Ix+1 Parameter."
If you have set the Pre-Evaluation parameter to "Antivalent," the F I/O module
behaves as follows:
The F I/O module compares the signal states of the digital inputs to the opposite
values. The following table shows the possible signal states for antivalent pre-
evaluation:
Inputs
Ix
0
1
0
1
Version 1.0.0, valid from HW/SW Version 01/01
Commissioning
Process Image
Ix+1 Ix
0 0
0 0
0 0
1 1
63
Signal Status
0-signal
Invalid
Invalid
1-signal
Manual