Siemens SIMATIC ET 200S Operating Instructions Manual page 268

2PULSE
5.3 Modes and Functions
Setting and Changing the Output Value
You use the Output Format PWM parameter to select the value range of the output value.
If your output value is between 0 and 1000, select the per mill output format.
If your output value is a SIMATIC S7 analog value (between 0 and 27648), select the S7
analog output output format.
You set the output value directly using your control program.
If you change the output value, the 2PULSE calculates the new pulse duration and interpulse
period immediately:
• If you make changes during the interpulse period and if the new output value is smaller
• If you make changes during the interpulse period and if the new output value is greater
• If you make changes during the pulse duration and if the new output value is lower than
• If you make changes during the pulse duration and if the new output value is greater than
Setting and Changing the Period
Set the period as a value between 2 and 65535 in the parameters:
Assigned period = time base x set numerical value
Using the factor for the period, you can adjust the assigned time in your control program. Set
the factor between 0 and 255, with a weighting of 0.1:
Period = factor x 0.1 x assigned period duration
If you change the factor, the 2PULSE immediately calculates the new period and with it the
new pulse duration and interpulse period:
• If you make changes during the interpulse period and if the new factor is lower than the
• If you make changes during the interpulse period and if the new factor is greater than the
• If you make changes during the pulse duration and if the new factor is lower than the
• If you make changes during the pulse duration and if the new factor is greater than the
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:
Assigned minimum pulse duration/minimum interpulse period = time base x set numerical
value
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than the previous one, the period is extended once only, since the new interpulse period
is longer.
than the previous one, the period is shortened once only, since the new interpulse period
is shorter.
the previous one, the period can be extended once only, since the interpulse period is
longer.
the previous one, the period remains constant.
previous one, a period that is shorter than the previous one but longer than the new one
is set once only.
previous one, a period that is longer than the previous one but shorter than the new one
is set once only.
previous one, a period that is shorter than the previous one but longer than the new one
can be set once only.
previous one, a period that is longer than the previous one but shorter than the new one
can be set once only.
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05