Siemens SIMATIC ET 200S Operating Instructions Manual page 305

Setting Times Using a Time Base
Use the configured time base to select the resolution and the value range of the on-delay.
Time base = 0.1 ms:
Time base = 1 ms:
Setting and Changing the Output Value
You select the range of the output value with the "Output format" parameter.
● If your output value is between 1 Hz and 5000 Hz, select the output format "1 Hz".
● If your output value is a SIMATIC S7 analog value (between 0 and 27648), select the "S7
You set the output value directly using your control program. The new frequency value is
applied at the next rising edge of the output.
Output frequency accuracy
The configured output frequency is output with the following accuracy at the digital output
DO:
● 0.01 Hz at output frequencies of 0.1 Hz to 800 Hz
● 0.1 Hz at output frequencies > 800 Hz to 2000 Hz
● 0.5 Hz at output frequencies > 2000 Hz to 5000 Hz
Set the on-delay when using the short control interface
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 short 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
Isochronous mode
Generally applicable information is available in the section "Isochronous mode (Page 267)".
In the "Frequency output" operating mode, isochronous mode does not have any influence
on the functionality.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
analog output" output format. With "S7 analog output" you attain a higher accuracy at the
setpoint specification.
The 2PULSE calculates the frequency according to the following equation:
Frequency = (Setpoint / 27648) × 5 kHz
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
305