Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 39)

2Ć5
2.1.3 Example of a Count Up Down Instruction
This logic shows that counter1 counts up to 500
as long as switch1 is on and switch2 transitions
from false to true. When the counter reaches
500, QU is set true, and the variable motor1
becomes true.
2.2 Resetting a Counter
To reset a counter, attach a Boolean parameter to CR so that when the Boolean
parameter is true, the value stored in Current is reset to 0. Any transitions to CU or CD
are ignored.