--- title: Topcon Digi-Star Scale slug: help/en-us/feedcomp/topcon-digi-star-scale docTags: createdAt: 2026-04-13T04:41:10.018Z --- Use these instructions to set up and connect a Topcon Digi-Star scale to the FeedComp App. Before you begin, make sure the scale is properly connected to a mixer so it can collect the data that will be sent to FeedComp. :::hint{type="warning"} **IMPORTANT: **Before you proceed with the recommended configurations below, take a look at your Topcon Digi-Star user manual. It contains excellent visual illustrations for working with the scale, connecting cables, and navigating the menu and digital display. Most importantly, it contains instructions for working safely with the electrical equipment: - [EZ2810 Operators Manual](https://support.scale-tec.com/portal/api/kbArticles/257166000019206961/locale/en/attachments/755h4720350631e6d444996c26d9b0e7302c0/content?portalId=edbsn30c41d12dc59a66624a359dfabd0aa266f58175a706dc346b85eebeca2f5dd44\&inline=true) - [EZ3410 Operators Manual](https://support.scale-tec.com/portal/api/kbArticles/257166000019206953/locale/en/attachments/755h44ce7e7d22e4242a59e167130d94c8a4f/content?portalId=edbsn30c41d12dc59a66624a359dfabd0aa266f58175a706dc346b85eebeca2f5dd44\&inline=true) You can also view Topcon Digi-Star's troubleshooting tips if you have any issues with the scale itself: [Topcon Digi-Star Scale Troubleshooting](https://www.youtube.com/watch?v=7cYuEUxGyCE). ::: After reviewing the manual, follow the sections below to verify your scale and setup, configure the required scale settings, connect the scale to the FeedComp App, and calibrate the scale (if needed): - [Supported Scales](docId:1mG2kfqVWauAQVNlFozKV) - [Configure Scale Settings](docId:1mG2kfqVWauAQVNlFozKV) - [Required Scale Settings](docId:1mG2kfqVWauAQVNlFozKV) - [Connect the Scale to the Mobile Device](docId:1mG2kfqVWauAQVNlFozKV) - [Connect the Scale to the FeedComp App](docId:1mG2kfqVWauAQVNlFozKV) - [Calibrate the Scale](docId:1mG2kfqVWauAQVNlFozKV) - [Check the Scale Setup Number](docId:1mG2kfqVWauAQVNlFozKV) :::::ExpandableHeading ### First Time Working with Scales? Check here before proceeding. :::hint{type="info"} **NOTE: **If the scale is already installed on the mixer, skip ahead to [Configure Scale Settings](docId:1mG2kfqVWauAQVNlFozKV). If the scale needs to be replaced, use the instructions in the Topcon Digi-Star manuals to mount the new scale, reconnect the wiring, and proceed to [Configure Scale Settings](docId:1mG2kfqVWauAQVNlFozKV). ::: If a scale is not already mounted and connected to your mixer, complete the hardware installation instructions in the operators manual. If you're installing a scale for the first time, it helps to understand how the mixer and scale components connect: ::Image[]{src="https://platform-docs.vas.com/en-us/Content/Resources/Images/Platform/feedcomp-img/web/fcp-scales-topcon-diagram.png" size="30" width="719" height="410" position="flex-start" darkWidth="719" darkHeight="410" showCaption="false"} ::::WorkflowBlock :::WorkflowBlockItem The mixer has **load cells** that measure how much weight is on a mixer. ::: :::WorkflowBlockItem The mixer's** junction box** houses all the wiring for the load cells. Topcon Digi-Star's manual shows how to connect the wires in the junction box: ::Image[]{src="https://platform-docs.vas.com/en-us/Content/Resources/Images/Platform/feedcomp-img/web/fcp-scales-topcon-manual-1.png" size="30" width="1127" height="817" position="flex-start" darkWidth="1127" darkHeight="817" showCaption="false"} ::: :::WorkflowBlockItem The** load cell cable** connects the mixer's junction box to the scale. Topcon Digi-Star's manual shows how to connect the load cell cable from the junction box to the scale: ::Image[]{src="https://platform-docs.vas.com/en-us/Content/Resources/Images/Platform/feedcomp-img/web/fcp-scales-topcon-manual.png" size="30" width="1086" height="814" position="flex-start" darkWidth="1086" darkHeight="814" showCaption="false"} ::: :::: After installation is complete, return to this page and follow the steps in [Configure Scale Settings](docId:1mG2kfqVWauAQVNlFozKV). ::::: ## Supported Scales - Topcon Digi-Star scale indicator (EZ2810 and EZ3410). Make sure the scale is Bluetooth-compatible (marked by a :inlineImage[]{src="https://platform-docs.vas.com/en-us/Content/Resources/Images/Platform/feedcomp-img/web/fcp-scales-bt_20x25.png" alt caption width="20" height="25"} on the lower left corner of the scale). - If you use Trioliet Shifttronic products with your scale, contact FeedCompSupport at fwsupport\@vas.com or 888-225-6753 to ensure that you apply the correct settings for your configuration. ## Configure Scale Settings Use the steps below to review or configure the settings on your scale to match the Required Scale Settings. Correct scale settings are critical for reliable communication between the FeedComp App and your scale. If the required settings are not configured correctly, the scale and app can fall out of sync, especially during pause and resume actions. This can cause the scale to remain in HOLD, prevent weights from updating correctly, or result in missed weight during feeding. :::hint{type="info"} **NOTE: **If you have an indicator with a number pad, you can manually enter each Direct Access Number (DAN#) for each parameter in [Required Scale Settings](docId:1mG2kfqVWauAQVNlFozKV), then review or configure each setting. ::: ::::WorkflowBlock :::WorkflowBlockItem On your Topcon Digi-Star scale, press **Select**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/5I9gJipD8mU5cRUgEmYYH_topcon-select.png" alt caption size="10" width="31" height="32"} repeatedly until the **Menu** is displayed. ::: :::WorkflowBlockItem Press and hold **Function**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/0e-ydhNN-VliqGOvoCzRx_topcon-function.png" alt caption size="10" width="31" height="32"} until you see the menu choices. ::: :::WorkflowBlockItem Repeatedly press **Select**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/5I9gJipD8mU5cRUgEmYYH_topcon-select.png" alt caption size="10" width="31" height="32"} to select Menu 1, 2, 3, 4, or 5. ::: :::WorkflowBlockItem Press **Enter**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/P6Cy_4q3jrqSdwYSWtdV7_topcon-enter.png" alt caption size="10" width="31" height="32"} to view the first setting name. Pay close attention: the setting name only displays once. ::: :::WorkflowBlockItem Check whether the setting is configured to the value listed in [Required Scale Settings](docId:1mG2kfqVWauAQVNlFozKV): 1. If the setting is not configured correctly, press **Net/Gross**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/RPm0Yqa-dZA2CfauZZ3IJ_topcon-netgross.png" alt caption size="10" width="31" height="32"} or **Select**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/5I9gJipD8mU5cRUgEmYYH_topcon-select.png" alt caption size="10" width="31" height="32"} to scroll through the options and press **Enter**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/P6Cy_4q3jrqSdwYSWtdV7_topcon-enter.png" alt caption size="10" width="31" height="32"} to select the correct value. The screen automatically displays the next setting.  2. If the setting is configured correctly, press **Enter**:inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/P6Cy_4q3jrqSdwYSWtdV7_topcon-enter.png" alt caption size="10" width="31" height="32"} to review the next setting. ::: :::WorkflowBlockItem Repeat the steps to review or configure each setting in each menu. ::: :::: ## Required Scale Settings **Menu 1** | **Parameter Name** | **DAN#** | **Parameter Value** | | ----------------------- | -------- | -------------------------- | | Scale ID Setup (SCALID) | 1003 | TMR-01 | | Display Unit (LB-KG) | 1008 | LB or KG | | Remote Input (RMINP) | 1401 | Do not set to HOLD. | | Remote Input 2 (RMINP2) | 1411 | PRINT. Do not set to HOLD. | **Menu 2** | **Parameter Name** | **DAN#** | **Parameter Value** | | ------------------------------------ | -------- | ------------------- | | Remote (REMOTE) | 2001 | ON | | Scoreboard Mode (SCOREM) | 2101 | 12 | | Front Panel Zerout (ZEROFP) | 2103 | OFF | | Scoreboard Mode 2 (SCRM2) | 2104 | 0 (Trioliet 11) | | Operation Status (OPSTAT) | 2111 | 0 | | Tare Auto Print (TAREAP) | 2301 | ON | | One Line Print (ILPRT) | 2302 | ON | | Print Format (PRTFMT) | 2304 | PRTAC1 | | Remote Display (RMDISP) | 2401 | EZ3MUX | | Remote Terminal (RMTERM) | 2402 | OFF | | Auto Detect Remote Display (AUTODRD) | 2403 | ON | | Bar Graph Mode (BARGRP) | 2411 | OFF | | Weight Graph (WTGRPH) | 2412 | ON | | Non-Digi-Star Display (NONDSP) | 2417 | OFF | **Menu 3** | **Parameter Name** | **DAN#** | **Parameter Value** | **Note** | | --------------------- | -------- | ------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Display Count (COUNT) | 3001 | Preferred Value (.01, .02, .05, .1, .2, .5, 1, 2, 5, 10, 20, 50, or 100) | Only set this value if you need to change how the scale increments are displayed. The scale also uses this value to round the preset amount. This setting cannot be changed in the app. The Topcon Display Text Count setting in the FeedComp App overrides this value. See Configure the Topcon Display Text Count to verify the app setting. | | Motion (MOTION) | 3101 | 0 (OFF) | — | **Menu 4** | **Parameter Name** | **DAN#** | **Parameter Value** | **Note** | | ------------------------------ | -------- | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Pre-Alarm Method (P MTHD) | 4001 | WEIGHT | — | | Pre-Alarm (P-ALM) | 4002 | Preferred Value | If you set this value, a warning is activated when the indicator approaches this value. For example, if you set the value to 50 (lbs/kgs), a warning alerts you when 50 (lbs/kgs) are set to be loaded or unloaded. | | Preset Daily (PRTDLY) | 4006 | 1 | — | | Preset Clear on Print (PRCLPT) | 4009 | ON | — | | Weight Toggle (WEITOG) | 4012 | OFF | This setting hides the preset message display after 10% of the target weight has been loaded or unloaded. | | Tolerance Method (T MTHD) | 4201 | WEIGHT | If the scale tolerance is 0, the value can be either WEIGHT or PERCENT. | | Tolerance (TOLER) | 4202 | 0 | — | **Menu 5** | **Parameter Name** | **DAN#** | **Parameter Value** | | ------------------------------ | -------- | ------------------- | | Remote Display (RMDPPT) | 5001 | COM3 | | Radio Port (RADPRT) | 5002 | COM3 | | External Radio Port (EXRPRT) | 5003 | COM2 | | Printer Port (PRPORT) | 5005 | COM3 | | Scoreboard Port (SCPORT) | 5006 | COM3 | | Opstat Port (OPSTAT) | 5007 | COM1 | | DDL Port (DDLPRT) | 5009 | COM2 | | 20MA Mirror Port (20MAMR) | 5011 | COM1 | | Scoreboard 2 Port (SCR2PRT) | 5015 | COM2 (Trioliet 1) | | Bluetooth Port (BLPORT) | 5016 | COM3 | | Remote Display Port 2 (RMD2PT) | 5018 | COM3 | **Menu 6** | **Parameter Name** | **DAN#** | **Parameter Value** | | ----------------------- | -------- | ------------------- | | Auto Print (AUTO PRINT) | 6231 | OFF | ## Connect the Scale to the Mobile Device After you verify the scale settings, connect the scale to your mobile device via Bluetooth: 1. On the scale, enter **90022** and press **Select**. 2. If the display shows an error message, press the **Zero** button four times, then press **ON**. The keypad shows the current Bluetooth setting as ON or OFF. 3. If Bluetooth is **OFF**, press the **Function** button to select **ON**, then **Enter** to save the setting. 4. Open your mobile device's Bluetooth settings. 5. Connect to the scale. 6. After it is connected, shut down the app completely and make sure it is cleared from your list of background apps. ## Connect the Scale to the FeedComp App 1. In the FeedComp App, tap your user icon :inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/TIzfdcfJw_kRk8AAGCnRr_greenuser25x25.png" alt caption size="10" width="25" height="25"} at the top right of the screen. 2. Tap :inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/uBdjhhxuzdciJIz9vj_JA_settingsoutlined25x25.png" alt caption size="10" width="25" height="25"}** Settings**. 3. Select the **Equipment** to connect. 4. Tap **Connect to Scale** and select the scale to connect. After a scale is connected to your mobile device, the Bluetooth icon :inlineImage[]{src="https://api.archbee.com/api/optimize/3h8pSJcGUXEi4HGCCYPTA/LnYaE3tdg56PgPS3KptZS_bluetoothconnected20x25.png" alt caption size="10" width="20" height="25"} displays at the top left of each screen in the FeedComp App. ## Loader View See [Set Up Loader View (BETA)](docId\:Jz7z-evo1pFXe8f3DBA5w) for setup details. ## Configure the Topcon Display Text Count After connecting the scale to the FeedComp App, verify the **Topcon Display Text Count** setting. This setting controls how many times ingredient text scrolls on the scale's display before the weight is shown. If this value is set higher than **1**, the display scrolls through the ingredient name multiple times before showing the weight, which can make it appear as though the scale is stuck or not updating. :::hint{type="warning"} ⚠️** IMPORTANT: **This setting is in the FeedComp App, not on the physical scale. It **overrides** any display parameter configured directly on the scale. Even if your scale is configured correctly, an incorrect value here will change the display behavior. ::: 1. In the FeedComp App, tap your user icon at the top right of the screen. 2. Tap **Settings**. 3. Locate the **Topcon Display Text Count** setting. 4. Verify the value is set to **1**. :::Paragraph{indent="1"} If the value is not **1**, tap the dropdown, select **1**, and tap **Save**. ::: :::hint{type="success"} 💡**TIP:** If your scale display keeps scrolling ingredient names and does not show the weight, check this setting first. A value higher than 1 causes the display to scroll the ingredient text that many times before showing the weight. ::: ## Calibrate the Scale If you are using a brand new mixer, calibrate the scale to ensure weight measurements are accurate and that ingredients are loaded correctly during feeding. To learn how to calibrate the scale or follow the instructions below or watch Topcon Digi-Star's video: ::embed[]{url="https://www.youtube.com/watch?v=gnO_2eRfq00"} :::hint{type="warning"} **IMPORTANT**: - Before calibration, ensure that the mixer is empty and parked on a level surface. - To perform the steps, a known weight needs to be used. Do not proceed with known weight calibration unless you have a known weight product that can be used during the calibration process (the more weight, the better). ::: ### Calculations Used in Calibration ::Image[]{src="https://platform-docs.vas.com/en-us/Content/Resources/Images/Platform/feedcomp-img/web/fcp-scales-calculation.png" size="44" width="648" height="91" position="flex-start" darkWidth="648" darkHeight="91" showCaption="false"} ### Calibrate the Scale 1. Set the Topcon Digi-Star scale to zero. 2. Put the **Known Weight** product into the mixer. - Example: 5,280 lbs 3. Record the **Scale Weight** shown on the scale indicator. - Example: 2,200 lbs 4. Calculate the **Weight Factor** by dividing the Known Weight by the Scale Weight. Record this number. - Example: 5,280 / 2,200 = 2.4 5. Press **Select** until you see Setup, then press **Function** until you see SETUP. 6. The scale displays the Setup Number. Do NOT change anything, just press the **ON** button once. 7. The scale displays the **Current Calibration Number**. Record this number. - Example: 16,000 8. Calculate the **New Calibration Number** by multiplying the Weight Factor (per Step 4) by the Current Calibration Number (per Step 7). - Example: 2.4 x 16,000 = 38,400 9. Type in the **New Calibration Number**, then press **ON** to save your changes. ## Check the Scale Setup Number 1. Power on the Topcon Digi-Star's indicator. 2. Press the **Select** button until the screen displays SETUP. 3. Quickly press and hold the **Function** button until the scale's 6-digit **Setup Number** is displayed. 4. If you need to change the Setup Number, enter the new number using the keypad, then press **ON** to save your changes. The screen then displays "CAL" followed by the scale's 5-digit Calibration Number. 5. Press **ON** to return to the gross weight.