Siemens SIMATIC FM 450-1 Manual page 78

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
9-10
www.gkbpx.com
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 and 2I1 (counter 2).
Action
Open hardware gate (level-controlled)
Close hardware gate (level-controlled)
Open hardware gate (edge-controlled)
Close hardware gate (edge-controlled)
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 a counter reaches the upper or lower count limit, it begins to count from
the load value. The count is continued without pulse losses. The relevant bit
is set in the DB:
Count Limit Reached
Upper limit
Lower limit
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)
Removing signal from input 1I0 (2I0)
Applying positive edge to 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
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/