On/Off-Delay" Operating Mode - Siemens SIMATIC ET 200S Operating Instructions Manual

5.4.5

"On/Off-delay" operating mode

Definition
The signal pending at the digital input DI is output with an on/off-delay at the digital output
DO by the 2PULSE.
Figure 5-10
Output Sequence Enable
You must always issue the enable for the output sequence by means of the software enable
(SW_ENABLE 0 → 1; MANUAL_DO = 0) in your control program, STS_ENABLE is then set.
The ACK_SW_ENABLE feedback bit indicates the software enable pending at the 2PULSE.
The positive edge on the DI digital input (0 → 1) starts the on-delay, and the DO digital output
is set on expiration of the on-delay.
The negative edge on the DI digital input (1 → 0) starts the off-delay, and the DO digital
output is deleted on expiration of the off-delay.
If the 2PULSE recognizes a pulse duration or interpulse period that is too short, this is
displayed by the ERR_PULS pulse output error.
At the next edge at the DI digital input, the 2PULSE deletes the ERR_PULS feedback bit.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
Block diagram for "On/Off-delay" mode
2PULSE
5.4 Modes and Functions
295