Topcon Digi-Star Scale
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.
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:
You can also view Topcon Digi-Star's troubleshooting tips if you have any issues with the scale itself: Topcon Digi-Star Scale Troubleshooting.
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
- Topcon Digi-Star scale indicator (EZ2810 and EZ3410). Make sure the scale is Bluetooth-compatible (marked by a
on the lower left corner of the scale).
- If you use Trioliet Shifttronic products with your scale, contact FeedCompSupport at [email protected] 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.
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, then review or configure each setting.
On your Topcon Digi-Star scale, press Select
repeatedly until the Menu is displayed.
Press and hold Function
until you see the menu choices.
Repeatedly press Select
to select Menu 1, 2, 3, 4, or 5.
Press Enter
to view the first setting name. Pay close attention: the setting name only displays once.
Check whether the setting is configured to the value listed in Required Scale Settings:
- If the setting is not configured correctly, press Net/Gross
or Select
to scroll through the options and press Enter
to select the correct value. The screen automatically displays the next setting.
- If the setting is configured correctly, press Enter
to review the next setting.
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:
- On the scale, enter 90022 and press Select.
- 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.
- If Bluetooth is OFF, press the Function button to select ON, then Enter to save the setting.
- Open your mobile device's Bluetooth settings.
- Connect to the scale.
- 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
- In the FeedComp App, tap your user icon
at the top right of the screen.
- Tap
Settings.
- Select the Equipment to connect.
- Tap Connect to Scale and select the scale to connect. After a scale is connected to your mobile device, the Bluetooth icon
displays at the top left of each screen in the FeedComp App.
Loader View
See Set Up Loader View (BETA)Set Up Loader View (BETA) 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.
⚠️ 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.
- In the FeedComp App, tap your user icon at the top right of the screen.
- Tap Settings.
- Locate the Topcon Display Text Count setting.
- Verify the value is set to 1.
If the value is not 1, tap the dropdown, select 1, and tap Save.
💡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:
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

Calibrate the Scale
- Set the Topcon Digi-Star scale to zero.
- Put the Known Weight product into the mixer.
- Example: 5,280 lbs
- Record the Scale Weight shown on the scale indicator.
- Example: 2,200 lbs
- Calculate the Weight Factor by dividing the Known Weight by the Scale Weight. Record this number.
- Example: 5,280 / 2,200 = 2.4
- Press Select until you see Setup, then press Function until you see SETUP.
- The scale displays the Setup Number. Do NOT change anything, just press the ON button once.
- The scale displays the Current Calibration Number. Record this number.
- Example: 16,000
- 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
- Type in the New Calibration Number, then press ON to save your changes.
Check the Scale Setup Number
- Power on the Topcon Digi-Star's indicator.
- Press the Select button until the screen displays SETUP.
- Quickly press and hold the Function button until the scale's 6-digit Setup Number is displayed.
- 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.
- Press ON to return to the gross weight.


