If in the case of an edge controlled HW gate a positive edge is again applied to input 1I1 (2I1),
the counter resumes counting from the load value irrespective of whether the gate is closed or
still open (retriggering) provided input 1I1 (2I1) is not set.
Behavior at count limits
If the counter reaches the upper or lower count limit and another count pulse arrives, the
counter is set to the other count limit.
Thereafter the gate is closed and the counting process terminated, even if the SW_GATE
parameter is still set or the HW gate is still open. The corresponding status bit is set in the DB of
the FC CNT_CTRL.
Count limit reached Bit in the DB
Upper count limit STS_OFLW is set
Lower count limit STS_UFLW is set
If you want to restart the counter, you must reset the SW_GATE parameter and/or reopen the HW
gate. The counting process is then continued from the load value.
Terminating counting process with the gate stop function
In addition you can terminate the counting process at any time using the gate stop function. For
this purpose you set the GATE_STP input parameter of the FC°CNT_CTRL.
8.6 Periodic counting
Overview
In this mode an FM 450-1 counter counts once from the load value up to the count limit, jumps
back to the load value and continues to count.
Select gate function
In this mode you can select the gate function Options:
• SW gate
• HW gate, level-controlled or edge-controlled
Modes, settings, parameters and commands
8.6 Periodic counting
Counter module FM 450-1
62 Equipment Manual, 03/2022, A5E03648739-AC
To Next Page
Loading...
