Function description
Operating Manual PSS u2 ES 8DI
1003610-EN-01
11
Initialise position
0-signal in the module
1-signal in the module
1-signal stretching
0-signal in the module
0-signal stretching
0-signal in the module
Waiting for 1-signal
1-signal in the module
Waiting for 0-signal
0-signal at the terminal
after pulse stretching has
elapsed
Pulse stretching active
0-signal at the terminal
1-signal at the terminal
1-signal at the terminal starts
pulse stretching
0-signal at the terminal
starts pulse stretching
1-signal at the terminal
after pulse stretching has
elapsed
1-signal at the terminal
after pulse stretching has
elapsed
0-signal at the terminal
after pulse stretching has
elapsed
Fig.: States for pulse stretching
stretch
l
stretch
l
Clamp
Pulse
stretching
Stretched
signal
1-signal
l
stretch
l
FALSE
l
TRUE
l
0-signal
l
1-signal
l
l
signal_min
l
signal_min
Fig.: Timing diagram: pulse stretching > signal duration of 1-signal
Legend
Clamp Signal at the terminal
Pulse stretching Pulse stretching
Stretched signal Stretched signal
t
1-signal
Duration of 1-signal
t
stretch
Duration of pulse stretching
t
signal_min
Time for which a signal must be present at the input in order to be de-
tected
t
TRUE
Stretched 1-signal in the module
t
FALSE
Stretched 0-signal in the module
