# Script Type Function Block Command: Set Value

### Command Description

Use this command to assign a value to a signal, such as a [message signal](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor/message-signals.md) or an [application signal](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-scripting-and-automation/application-signals.md).

### Value Field Parameters

The assignment takes place using the [Expression Builder](/vspy-3-documentation/shared-features-in-vehicle-spy/shared-features-expression-builder.md). Launch it by double-clicking in the **Value** cell for the **Set Value** command. Then enter the signal you want to assign in the **Value To Set** field, and the expression for the value to assign in the **Expression** field.

If the signal is a [Physical IO property](/vspy-3-documentation/shared-features-in-vehicle-spy/shared-features-expression-builder.md#physical-io-properties) then MISC IO reporting in 3G Explorer must be enabled in the hardware.

### Example

Figure 1 shows a simple script that transmits an Automotive Ethernet message using a sequential counter. The first **Set Value** command increments the **Counter** application signal. The second assigns that signal's current value to the **Sequence Counter** signal within the transmit message **Tx Message Ethernet 1**, and sends the message. The script waits for 10 milliseconds, and then repeats.

![Figure 1: Sample sequence counter script illustrating use of the Set Value command.](/files/AyXiEVVnL0kf9fp2ntx8)

Figure 2 shows how the **Set Value** statement in step 2 is set up in the Expression Builder.

![Figure 2: Setup for second Set Value statement in Figure 1.](/files/svWlloWs5Kfja895IiRs)


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