35
Quadruple frequency mode
5-3-2. High speed counting range
The counting range of high-speed counter is: K-2,147,483,648 ~ K+2,147,483,647. When the count value
exceeds this range, overflow or underflow occurs.
The so-called overflow is to jump the count value from K+2147483647 to K-2147483648 and continue
counting. When underflow occurs, the count value jumps from K-2147483648 to K+2147483647 and continues
to count.
5-3-3. High speed counter input wiring
The wiring of counting pulse input terminal is slightly different according to the type of programmable
controller and the model of counter. The typical wiring methods are shown in the following figure (taking HSC0
of XG1 series 16 points PLC as an example):
(1)
Incremental mode
(Counter HSC0)
COM
COM
X1
X0
X3
X2
X4
X5
X6
Pulse input
