---
title: CMO (control algorithm)
description: "![](https://faqdoc.info/wp-content/uploads/2026/01/Matrix_55__icon_Elektro-Wasser.png) Setting of the control algorithm to be used. **HYS** HYS: Hysteresis (2-point control, see → [DIF](https://faqdoc.info/en/systemauswahl/alpha-direct-en/alpha-direct-thermostat-55-matrix/dif-hysteresis/)) **PWM** PWM: Pulse width modulation (default)"
url: "https://faqdoc.info/en/systemauswahl/alpha-direct-en/alpha-direct-thermostat-55-matrix/cmo-control-algorithm/"
updated: "2026-09-30"
category: Alpha direct thermostat 55 Matrix
---

# CMO (control algorithm)

![](https://faqdoc.info/wp-content/uploads/2026/01/Matrix_55__icon_Elektro-Wasser.png)

Setting of the control algorithm to be used.

**HYS**
HYS: Hysteresis (2-point control, see → [DIF](https://faqdoc.info/en/systemauswahl/alpha-direct-en/alpha-direct-thermostat-55-matrix/dif-hysteresis/))

**PWM**
PWM: Pulse width modulation (default)