Siemens SIMATIC ET 200S Operating Instructions Manual page 32

1Count24V/100kHz
2.6 Count Modes
Gate Control by Means of the SW Gate and HW Gate
If the SW gate opens when the HW gate is already open, counting continues starting from
the current count.
When the HW gate is opened, one of the following occurs, depending on the parameter
assignment:
• Counting continues from the current count, or
• Counting starts from the load value
If the SW gate is opened in isochrone mode in bus cycle "n" by setting the SW_GATE control
bit, counting starts at time T
HW gate opens between T
open. In both cases, the 1Count24V/100kHz delivers the current count value in cycle "n+1"
starting from time T
32
in cycle "n+1" if the HW gate is already open at this time. If the
o
and T in cycle "n+1", counting only starts once the HW gate is
o i
.
i
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05