IOCAN

# CAN Object Output

## Overview

A **CAN Object Output** is a single named **CAN object** sent by a

[CAN Preset](Working_with_the_CAN_Bus#can-presets) for a supported device.

Like the [CAN Object Input](CAN_Object_Input), it is a **technical

output created by the preset** — you do not add or configure the frame/encoding by

hand. When you add a CAN Preset it creates the object outputs the device accepts;

your job is to **drive** the one you need with a source value (a map, driver or

input).

If instead you need to pack a signal into a raw frame by hand, use a

[CAN Bus Output](CAN_Bus_Output).

## Prerequisites

- A **defined CAN bus** for the channel the device is on — see

  [Working with the CAN Bus](Working_with_the_CAN_Bus).

- A **CAN Preset** added for the device — adding it creates the object outputs.

- A source value to drive the object.

## How it's created

1. Add the device's **CAN Preset** on the relevant CAN bus.

2. The preset creates the object outputs the device accepts (e.g. `Gear Number`).

3. Drive the object you need from a map/driver/input.

The frame and encoding are owned by the preset and cannot be changed here.

## Settings reference

> Schema: `config/CanObjectOutputData.proto`.

A CAN Object Output has **no user-configurable encoding** — the preset provides the

object; you only choose what **drives** its value.

## Example — gear number to a dash

1. Add the dash's **CAN Preset** on the relevant CAN bus.

2. The preset creates its `Gear Number` object output.

3. Drive it from the current-gear value so the dash shows the selected gear.

## Troubleshooting

- **The object output doesn't exist:** confirm the **CAN Preset** that provides it

  is added and on the correct CAN bus.

- **Dash/device shows nothing or stale data:** check the CAN bus baud rate and that

  the object is actually being driven by a source.

## Related

- [CAN Bus Output](CAN_Bus_Output) — pack a signal into a raw frame by hand.

- [CAN Object Input](CAN_Object_Input) — a named object the preset

  provides as an input.

- [Working with the CAN Bus](Working_with_the_CAN_Bus)