# Counter

- [CounterCircle](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/countercircle.md)
- [mReset](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/countercircle/mreset.md)
- [ImpulseCounter](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/impulsecounter.md)
- [mReset](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/impulsecounter/mreset.md)
- [ServiceCounter](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/servicecounter.md)
- [mReset](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/servicecounter/mreset.md)
- [OperatingHours](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/operatinghours.md)
- [mReset](/hub/codesys-hvac/en/hvac-library/functionblocks/counter/operatinghours/mreset.md)