Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 86)

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YASNAC PCNC PLC Programming Manual Chapter 6: PLC Instructions
(3) SUBP 005 (COUNTER) RR after operation:
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(a) Function
The counter can be used for the following purposes to control machine tool operation as
indicated below according to the applications.
• Ring counter
The counter is a ring counter. Accordingly, the counter value returns to the initial
value if a count signal is input after counting to the preset value.
• Preset counter
The count-up signals is output when the count value reaches the preset value.
• Up/down counter
The counter can be used for both up and down counters.
(b) Example