18
2 Product description
2.2.3
Debounce filter / stable time filter
The stable time filter is used for bouncing safeguards.
The default settings are normally adequate.
For very difficult applications with extremely bouncing safeguards, the stable time
and the monitoring time can also be set manually.
INFORMATION
The default settings specified in Chapter 2.3 "Wiring examples and parameteriza-
tion" are normally adequate for the reliable operation of a machine
with bouncing safeguards!
The stable time filter automatically detects when a bouncing safeguard has come
to a standstill, in other words when it has come to a "stable" situation.
If a constant switch-on signal is received at both inputs for the duration of the
stable time, the safety function is switched on.
In difference to discrepancy time filters, the release of the safety function is only
delayed by the set stable time in the stable time filter and the release of the safety
function is not time-dependent, but only when the safeguard has actually come to a
standstill.
The stability time filter is required for safety switchgear with contacts.
In safety switchgear with electronic OSSDs, the output signals are normally filtered
internally.
Operation of the stable time filter when using 2 channel safety inputs
−
The stability time filter effects an intelligent discrepancy monitoring
of the input signals.
−
If one contact is switched on for the first time, the monitoring time is
started.
−
If both contacts are switched on for the duration of the stable time inside
the set monitoring time, the safety function is switched on.
−
If the contacts do not come to a standstill, the fault message
"Discrepancy / stability time fault Device-Port X…" is displayed
after the monitoring time has passed.
−
If only one contact, temporary or permanent, is switched off or the two
contacts do not come to a standstill, the fault message is also displayed
after the monitoring time has passed.
Operation of the stable time filter when using 1 channel safety inputs
−
The stable time filter effects a debounce function for the input signal.
−
If the contact is switched on for the first time, the monitoring time is
started.
−
If the contact is switched on for the duration of the stable time inside the
set monitoring time, the safety function is switched on.
−
If the contact does not come to a standstill, the fault message
"Discrepancy / stability time fault Device-Port X…" is displayed after the
monitoring time has passed.
−
If the contact switches off temporary or does not come to a standstill, the
error message is also displayed after the monitoring time has passed
