Function description
Operating Manual PNOZ s30
1001715-EN-19
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5.3.13 Switch delay
A delay time can be set for each output (see technical details). The outputs will not switch
until the set time has elapsed. It is possible to configure whether the delay time is to be ac-
tivated when switching on, switching off, or switching on and off.
WARNING!
Potential loss of safety function due to increased reaction time
The output switch-off delay (t
do
,Off) when overspeed is reached will in-
crease the speed monitor's reaction time by the stated value (see technical
details). This must not delay the arrival of a safe condition by more than the
permitted time. The configuration of the switch-off delay must be considered
in the risk assessment as regards hazards, reaction time and safety dis-
tance.
The following delay types can be configured:
Switch-on delay retriggerable
After a rising edge (e.g speed is in the permitted range) the output will switch on only when
the configured time has elapsed. When there is another rising edge during the delay time,
the delay time is restarted.
Switch-off delay retriggerable
After a falling edge (e.g speed is exceeded) the output will switch off only when the con-
figured time has elapsed. At a rising edge during the delay time, the time is reset without
the output switching off.
Switch-on switch-off delay retriggerable
After a rising edge the output will switch on only when the configured time has elapsed.
After a falling edge (e.g speed is exceeded) the output will switch off only when the con-
figured time has elapsed. When there is another rising or falling edge during the delay time,
the delay time is restarted.
Switch-off delay not retriggerable
After a falling edge (e.g speed is exceeded) the output will switch off only when the con-
figured time has elapsed. A rising edge during the delay time has no effect. The output
switches off when the time has elapsed.
5.3.14 Feedback loops
Feedback loops are used to monitor external contactors or relays. The corresponding feed-
back loop must be closed before starting.
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