Siemens SIMATIC ET 200S Operating Instructions Manual page 271

Input and Output Signals of Pulse-Width Modulation Mode
Input and Output Signals
Input signal
HW enable
Output signal
Pulse train on the digital
output DO
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
Meaning
You can select the HW enable
with the Function DI
parameter.
The signal of the digital input
DI is then interpreted by the
2PULSE at the start of the
output sequence.
The pulse train is output on
the digital output DO.
Value Range
0 = HW enable canceled
1 = HW enable issued
0→1= Start of the output
sequence; dependent on the
software enable
0 = no pulse
1 = pulse
2PULSE
5.3 Modes and Functions
Channel 0 Channel 1
terminal terminal
1 5
4 8
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