Siemens SIMATIC ET 200S Operating Instructions Manual page 275

Setting times using a time base
By means of the time base that can be assigned parameters, you can select the resolution
and range of the pulse duration and the on-delay.
Time base = 0.1 ms:
Time base = 1 ms:
Setting and Changing the Pulse Duration
Set the pulse duration directly in your control program as a numerical value between 0 and
65535.
Pulse duration = Time basis x Specified numerical value
If you change the pulse duration when an output sequence is running, the time already
output will be subtracted from the new pulse duration and the pulse will continue to be
output.
Reducing the Pulse Duration
If you have reduced the pulse duration to a time that is shorter than the time already output,
the output sequence is terminated, STS_ENABLE and the DO digital output are deleted, and
the ERR_PULS status bit is set. At the next output sequence, the ERR_PULS status bit is
cleared.
Set the on-delay and change when using the short control interface
Set the on-delay as a value between 0 and 65535 in the parameters.
Configured on-delay = Time base x specified numerical value
Using the factor for the on-delay, you can adjust the time that has been assigned parameters
in your control program. Set the factor between 0 and 255, with a weighting of 0.1:
On-delay = Factor x 0.1 x configured on-delay
If you change the on-delay factor during the output sequence, the new on-delay is activated
at the next output sequence.
Isochronous mode
Generally applicable information is available in the section "Isochronous mode (Page 267)".
In the "Pulse output" operating mode, isochronous mode does not have any influence on the
functionality.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
You can set times from 0.2 ms to 6.5535 s with a resolution of 0.1 ms.
You can set times from 1 ms to 65.535 s with a resolution of 1 ms.
2PULSE
5.4 Modes and Functions
275