Siemens SIMATIC ET 200S Operating Instructions Manual page 285

Time period at configuration with short control interface
You specify the time period in the parameters as a numerical value depending on the time
base:
● With time base 1 ms: from 1 to 65535
● With time base 0.1 ms: from 2 to 65535
Configured time period = Time base x specified numerical value
Using the factor for the period duration, 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:
Time period = Factor x 0.1 x configured time period
The new setpoints for the time period are applied with the next rising edge of the output.
Note
If the time period changes in runtime, a brief minor increase in the time period can result
(approx. 10 µs).
Note
A change in the time period using the control interface has no effect in isochronous mode.
Setting the Minimum Pulse Duration and Minimum Interpulse Period
You specify the minimum pulse duration and the minimum interpulse period as a numerical
value between 0 and 65535 using the "Minimum pulse duration" parameter:
Configured minimum pulse duration/minimum pause between pulses = Time base x
specified numerical value
Setting the On-Delay
You specify the on-delay as a value between 0 and 65535 in the parameters.
Configured on-delay = Time base x specified numerical value
When the long control interface is used, the factor for the on-delay can be used to adjust the
configured time 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
Measurement of current
An important application for current measurement in the "Pulse width modulation" operating
mode is the current regulation of a proportional valve. This allows you to compensate for
thermal effects at the valve, for example.
For more information, refer to the section "Function: Measurement of current (Page 310)".
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
2PULSE
5.4 Modes and Functions
285