Siemens SIMATIC ET 200S Operating Instructions Manual page 209

Gate Control
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 count, 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 before or after T
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 isochronous mode in bus cycle "n" by setting the SW_GATE
control bit, counting starts in cycle "n+1" before or after T
this time. If the HW gate opens after the SW gate has been opened, then counting does not
start until the HW gate opens.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
, depending on the position of T
i
, if the HW gate is already open at
i
1Count5V
3.9 Position feedback
.
i
209