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Operating Modes, Settings, Parameters and Commands
Opening and
Closing the
Hardware Gate
Behavior at the
Count Limits,
Hardware Gate
9
Terminating the
Count with the
Gate Stop
Function
9-8
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You open and close the hardware gate and set the counter to the load value
by applying the relevant signals to or removing the signals from the inputs
1I0 and 1I1 (counter 1) or 2I0 2I1 (counter 2).
Action
Open hardware gate (level-controlled)
Open hardware gate (edge-controlled)
Close hardware gate (level-controlled)
Close hardware gate (edge-controlled)
In the case of a level-controlled hardware gate, the gate is reopened and each
counter is set to the load value by a signal at input 1I0 (2I0).
If a positive edge is applied again to input 1I0 (2I0) in the case of an edge-
controlled hardware gate, the counter begins to count again from the load
value, regardless of whether the gate is closed or still open (retriggering),
provided input 1I1 (2I1) is not set.
If the counter has reached the upper or lower count limit and a further count
pulse is received, the counter is set to the other count limit, the gate is closed
and the count is terminated even if the hardware gate is still open. The rele-
vant bit is set in the DB.
Count Limit Reached
Upper limit
Lower limit
If you want to restart the counter, you must reset input 1I0 (2I0). The counter
then begins to count from the load value.
You can also terminate the count at any time with the gate stop function. For
this purpose, set the input parameter GATE_STP of the FC CNT_CTRL.
...Is Initiated By
Applying signal to input 1I0 (2I0)
Applying positive edge to input 1I0 (2I0)
Removing signal from input 1I0 (2I0)
Applying positive edge to input 1I1 (2I1)
Bit in DB
STS_OFLW is set
STS_UFLW is set
FM 450-1 Counter Function Module
C79000-G7076-C450-01
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