Siemens SIMATIC ET 200SP Manual page 20

Modes and Functions
3.2 Pulse output (single pulse) mode
Setting and changing the On-delay
● Permanent update
The On-delay can be controlled permanently using the control interface. The
MODE_SLOT bit has to be 1 (permanent-update); LD_SLOT must have the value 2
(for On-delay). Set the On-delay as a value between 0 μs and 85,000,000 μs in the
control interface field SLOT.
● Single Update
Set the On-delay as a value between 0 μs and 85,000,000 μs in the configuration
parameters. Alternatively, you can do a single update using the control interface.
MODE_SLOT has to be 0 (single-update); LD_SLOT has to have the value 2 (for
On-delay). Set the On-delay as a value between 0 μs and 85,000,000 μs in the control
interface field SLOT.
If you change the On-delay value during the output sequence, then the new On-delay is
activated on the next output sequence.
For more details about the use of the SLOT value, see SLOT parameter handling (Page 113)
Using the Sequence counter
The Sequence counter counts completed pulse output sequences and provides the count
value variable SEQ_CNT in the feedback interface. The sequence counter can count short
output sequences that are too fast to be monitored by your program. See Sequence counter
(Page 75) for details.
Isochronous mode
General information is available in Function: Isochronous mode (Page 86).
Isochronous mode does not have any influence on the functionality of Pulse output operating
mode.
If you want to synchronize the output sequence with T
to "Input" and the Pulse output sequence starts at T
20
, then set the Function DI parameter
o
.
o
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA