Siemens FM 450-1 - Page 60

Select gate function
In this mode you can select the gate function Options:
• Without gate (default)
• SW gate
• HW gate, level-controlled or edge-controlled
&RXQWHUVWDWXV
7LPH
&XUUHQWFRXQWHUVWDWH
8SSHUFRXQWOLPLW
/RZHUFRXQWOLPLW
*DWHVWDUW

*DWHVWRS
Figure 8-1 In󹪝nite counting with load value and gate function
Open and close SW gate
You open and close the SW gate of the relevant counter with the input parameter SW_GATE of
the FC CNT_CTRL (see chapter "The FC CNT_CTRL function (Page 39)").
Action Initiating event
Open SW gate Set SW_GATE
Close SW gate Reset SW_GATE
Opening and closing HW gate
You open and close the HW gate of the relevant counter by applying or removing the
corresponding signals to or from the inputs 1I0 and 1I1 (counter 1) and/or 2I0 and 2I1 (counter
2).
Action Initiating event
Opening HW gate (level controlled) Applying signal to input 1I0 (2I0)
Closing HW gate (level controlled) Removing signal from input 1I0 (2I0)
Opening HW gate (edge controlled) Applying positive edge to input 1I0 (2I0)
Closing HW gate (edge controlled) Applying positive edge to input 1I1 (2I1)
When the HW gate opens the counter resumes counting from the current counter status.
Terminating counting process with the gate stop function
In addition you can end the count process when counting with the SW gate or HW gate by means
of the gate stop function of the relevant counter. For this purpose you set the GATE_STP input
parameter of the FC CNT_CTRL.
Modes, settings, parameters and commands
8.4 In󹪝nite counting
Counter module FM 450-1
60 Equipment Manual, 03/2022, A5E03648739-AC