# Using the Monitors - Sensors window The Sensors tab displays the current values of the speed and temperature sensors including their status in real time.
| How to open Monitors - Sensors:
Select Service > Monitor 1 > Sensors in the main window. If there is communication with a connected transmission control unit, the current sensor status is displayed automatically in real time. If communication with a transmission control unit is not possible, this will be indicated by a at the bottom right of the window: This message is also displayed when communication with a connected transmission control unit has been interrupted. For help in the event of communication problems, please refer to: Communication problems. Once you have eliminated the communication problems, click "Yes" if ALADIN is to re-establish communication with a transmission control unit. An existing communication is shown by the progress bar.
| The display of the sensor data:
> > Field A Name and installation location of the sensor. Field B Sensor type
> > Symbol | Sensor type |
> > | Speed sensor |
> > | Temperature sensor |
> > Field C Sensor display
> > Display | Description |
> > Idle | This sensor is not installed in this transmission type. |
> > Error | A fault has been detected at the sensor. Please read the event memory! For further information, please see: Report |
> > Value | Speed sensor: current speed in Hz Temperature sensor: current temperature in °C |
> > Field D Sensor status
> > Symbol | Status |
> > | The sensor is ready for operation and provides measured values. |
> > | A fault occurred at this sensor. Perform an upload for selective troubleshooting. For further information, please see: Upload |
> > | This sensor is not used in this transmission type. |
| The general display in Monitors:
> The general display is shown in every tab of the Monitors window. On top, there are four symbols for:
> Symbol | Description |
> | General transmission fault. |
> | General retarder fault. |
> | Transmission temperature too high. |
> | Retarder temperature too high. |
> Below, there is the real-time display of the following signals:
> Signal | Description |
> n1 | Engine speed / transmission input speed |
> n2 | Transmission output speed |
> n3 | Turbine speed |
> FP | Accelerator pedal position |
> BP | Brake pedal position |
> Time | Display of the sample time (for debugging tasks only) |
| Further topics:
More information on: Communication problems More information on: Connector pin assignment More information on: Report More information on: Upload Up > Higher-level section © by Voith Turbo GmbH & Co. KG send remarks to joachim.ehleiter@voith.com (electronic department) or r.theilacker@voith.com (electronic department)