Siemens SIMATIC ET 200S Operating Instructions Manual page 140

1Count5V
3.6 Count Modes
Figure 3-8
Gate control by means of the SW gate only
When the gate is opened, one of the following occurs, depending on the parameter
assignment:
● Counting continues from the current counter status, or
● Counting starts from the load value
If the SW gate is opened in isochronous mode in bus cycle "n" by setting the SW_GATE
control bit, counting starts at time T
delivers the current count value from time T
(http://support.automation.siemens.com/WW/view/en/15218045) function manual)
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 counter status.
When the HW gate is opened, one of the following occurs, depending on the parameter
assignment:
● Counting continues from the current counter status, or
● Counting starts from the load value
If the SW gate is opened in isochronous mode in bus cycle "n" by setting the SW_GATE
control bit, counting starts at time T
time. If the HW gate opens between T
HW gate is open. In both cases, the 1Count5V delivers the current count value in cycle "n+1"
starting from time T
140
Count Continuously, Down, Canceling Gate Function
o
o
.
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in cycle "n+1". In the same cycle "n+1", the 1Count5V
. (See Isochronous Mode
i
in cycle "n+1" if the HW gate is already open at this
and T in cycle "n+1", counting only starts once the
o i
Operating Instructions, 06/2010, A5E00124867-07
Technological Functions