WAGO 8FDI 24V PROFIsafe 750-662/000-004 Manual page 118

118 Glossary
D
Dangerous Failure
Termination of the capacity of a unit to perform the required function (see also
"Failure").
DC (Diagnostic Coverage)
Diagnostic coverage is the decrease in probability of dangerous hardware
failures that result from executing automatic diagnostics tests.
DC13 (Utilization Category)
Utilization category DC13 of IEC 60947-5-1 describes the making and breaking
capacity for switching elements to switch an electromagnetic load.
Default Setting
A default setting is a preset value of a parameter that is used if the user does not
make any other settings (see also "Default iParameter Set").
Default iParameter Set
A data set persistently stored in the F I/O module with default values that
correspond to the iParameter set in the F I/O module when delivered.
Diagnostic Coverage Level
See "DC (Diagnostic Coverage)"
Discrepancy Error
A discrepancy error is reported if the discrepancy time is exceeded during dual-
channel pre-evaluation. The module outputs the diagnostic message
"Discrepancy time exceeded."
Discrepancy Time
The discrepancy time specifies the maximum permissible duration of unequal
states of two signals.
Discrepancy Time Monitoring
The F I/O module performs discrepancy time monitoring when dual-channel pre-
evaluation is used by comparing the signal states of two digital inputs against the
valence rule. If the inputs signals deviate from the valence rule, discrepancy time
monitoring is activated (see also "Discrepancy Time").
E
Equivalence
Two identical input signals, e.g., two open contacts on two inputs of the F I/O
module
Manual
Version 1.0.0, valid from HW/SW Version 01/01
WAGO I/O System
750-662/000-004 8FDI 24V PROFIsafe