Pulse Output" Operating Mode - Siemens SIMATIC ET 200S Operating Instructions Manual

5.4.2

"Pulse output" operating mode

Definition
For the pulse duration you set, the 2PULSE outputs a pulse at the DO digital output (output
sequence) on expiration of the set on-delay.
Figure 5-3
Starting the Output Sequence
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.
The ACK_SW_ENABLE feedback bit indicates the software enable pending at the 2PULSE.
You can also set the DI digital input of the 2PULSE as a hardware enable (HW enable) with
the "DI function" parameter.
If you want to work with the software enable and hardware enable at the same time, when
the software enable has been issued, the output sequence starts at the first positive edge of
the hardware enable. Further positive edges of the hardware enable during the current
output sequence are ignored by the 2PULSE. When the software enable has been issued, a
positive edge of the hardware enable is enough to start the next output sequence.
When the enable is issued (positive edge), the on-delay is started and the STS_ENABLE
set. On expiration of the on-delay, the pulse is output with the set pulse duration. The output
sequence finishes with the end of the pulse; STS_ENABLE is cleared.
If you make a prohibited change to the pulse duration during runtime, the ERR_PULS signal
indicates a pulse output error. You will then have to restart the output sequence.
The next time the output sequence starts, the 2PULSE deletes the ERR_PULS feedback bit.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
Block diagram for the "Pulse output" operating mode
2PULSE
5.4 Modes and Functions
273