# Script Type Function Block Command: Set Value

### Command Description

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

### Value Field Parameters

The assignment takes place using the [Expression Builder](https://docs.intrepidcs.com/vspy-3-documentation/shared-features-in-vehicle-spy/shared-features-expression-builder). 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](https://docs.intrepidcs.com/vspy-3-documentation/shared-features-in-vehicle-spy/shared-features-expression-builder#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.](https://3170208387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL6lcovCpkhoS9uTOFtEp%2Fuploads%2Fdr25DD1keOUV4Smrto7B%2Ffb_set_value_1.gif?alt=media\&token=7308bcfd-2548-448a-9610-74cb3b5e278f)

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.](https://3170208387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL6lcovCpkhoS9uTOFtEp%2Fuploads%2FFrnfJ9acZyOQW3GqzBZ7%2Ffb_set_value_2.gif?alt=media\&token=f6fba03a-3931-48d5-949b-822551007222)