Different **Valve Interface** selections display different **Valve Number** selections depending on how they work - for more information please see the section in the **COMMAND** manual.
[](https://docs.t3rra.com/uploads/images/gallery/2025-08/CsyaCZMOhJtlnLtO-image.png) ## Selecting the Valve Number When selecting **Valve Interface** options like JD CAN, J1939 and Fendt ONE will only display valve numbers that have been detected on the ISOBUS or machine CANBUS. Below shows an example of the dropdown with the tractor switched off. [](https://docs.t3rra.com/uploads/images/gallery/2026-06/vJVspAPIEaaHEpaz-image.png) Once detected on the ISOBUS or machine CANBUS, any available SCV / Remote / Auxiliary valve selections will be displayed in the **Valve Selection** list as shown: [](https://docs.t3rra.com/uploads/images/gallery/2025-08/Z1rpwjhhDtPDhwEv-image.png) Analog valve interfaces such as Proportional Solenoid and PWM to 0-5V always display all available **Valve Selection** options. Valve signals for these selections generally rely on harnessing to connect the outputs of the **COMMAND** ECU to the proportional solenoid or laser system inputs. [](https://docs.t3rra.com/uploads/images/gallery/2025-08/wmEjkiD9uWjcxzmQ-image.png) ## Valve Status **Valve Status** provides information on the current status of the selected **Valve Interface** and **Valve Selection**. The table below explains each of the different possible valve statuses that may appear:| **Status** | **Description** |
| Valve Unavailable | The selected valve is not available for use. |
| Waiting for Manual SCV Input | Move the SCV lever corresponding to the selected SCV - this must be done when using John Deere tractors. |
| Short to Ground | An overload has been detected and the resistance between the valve signal output pin and ground is near-zero, holding the output low. |
| Short to Batt | An overload has been detected and the valve signal output pin is being fed power from another source holding the output high. |
| Open Load | A connection or valve issue has been detected, and the resistance between valve signal output pin is too high, indicating a broken wire or valve solenoid/coil. |
| SCVs Locked | The SCVs must be unlocked using the console SCV padlock button. |
| System Not Armed | The **COMMAND** Arm/Engage switch must be armed or re-armed. If the Arm/Engage switch is currently Off: - Switch the Arm/Engage switch to the middle position. If the Arm/Engage switch is currently in the middle position: - Switch the Arm/Engage switch to the OFF position, and then back to the middle position. |
| Ready | The selected valve is currently not active and the ECU is ready for automatic control or manual control commands for that function. |
Regardless of **Override Behaviour** selection, **COMMAND** will always prioritise joystick/manual control signals over automatic control signals to maintain full operator control of the implement.
[](https://docs.t3rra.com/uploads/images/gallery/2026-06/nNQwrwdSyaPstVDg-image.png) #### Example Height Valve Configuration Page Below shows an example of a configuration using PWM to 0-5V **Valve Interface**, using the **T3H-V001** valve adapter on Output 1, with **Automatic Control** enabled. **External Joystick Control** has also been enabled for use with a J1939 CANBUS joystick, with the Y-axis controlling the Height function and will momentarily disengage automatic control when the joystick is moved. [](https://docs.t3rra.com/uploads/images/gallery/2026-06/J3NTkoYgKZNqd3Va-image.png) #### Example X-Slope Valve Configuration Page Swapping over to the X-Slope function using the bottom right button, an example configuration shown below is set up to use PWM to 0-5V **Valve Interface**, using the T3H-V001 adapter on Output 2. X-Slope is enabled for automatic control, and also has External Joystick Control enabled for use with a J1939 CANBUS joystick on the X-axis, momentarily disengaging when the operator moves the joystick. [](https://docs.t3rra.com/uploads/images/gallery/2026-06/8qfvbowzlQLf2rcz-image.png) Press "**Back**" to return to the COMMAND Settings Overview page and continue on to **3.6 | Valve Threshold Calibration**.