DP2122
Speed monitor
12
4.4.7 Switch-off delay
The switch-off delay enables filtering of input signals. The switching delay is activated or restarted by a
negative switching edge of the input signal. Only if the input signal is still inactive after the delay time
has elapsed, the output wil be set to the inactive switching state. Pulse pauses that are shorter than
the switch-back delay will be filtered.
Input signal
Output signal
NO contact / High active / no
Switch-off delay
Output signal
NC contact / Low active / nc
4.5 Start-up delay
The start-up delay enables the suppression of error signals when a plant is started. It is effective after
the power supply is applied and is dependent on a low speed.
If the drive is frequently switched on and off, it is advisable to couple the voltage supplies of the drive
and the speed monitor. By doing so, the start-up delay is active every time the motor is turned on.
If a coupled connection of the voltage supplies is not possible, a start trigger point can be set in the
process date or in SIO the via ENABLE (Pin 2) via IO-Link. The positive switching edge of the
corresponding signal serves as the start trigger point. In addition, the system can start up by itself;
after detection of the first pulses the delay timer is started (value: 0...999.9 s in steps of 0.1 seconds).
