Mitsubishi Electric MELSEC iQ-R Series User Manual page 468

Resetting counters
The counter current value is not cleared even when the counter coil input is turned off. To clear the counter current value
(resetting) and turn off the contact, issue the RST C/RST LC instruction. When executing the RST C instruction, the
counter value is cleared and the contact is turned off.
[Ladder example]
X0
[Reset timing of the counter]
Program
X0
OFF
OFF
RST C0 instruction
(1) The count value is cleared, and the contact turns off.
27 DEVICES
466
27.3 User Device
RST C0
END RST C0
ON
Execution
(1)
END RST C0 END RST C0
(1)