qitech-control

The WAGO 750-430 Digital Input Example demonstrates how to read digital inputs from a WAGO 750-430 EtherCAT terminal using the QiTech machine framework. This example shows one of the simplest hardware interactions: reading 8 digital input channels via the QiTech Control Dashboard. To test the inputs, a 24VDC signal must be wired to the input terminals.

2. Requirements

Hardware

WAGO 2787-2144 EtherCAT
WAGO 750-354 EtherCAT Coupler
WAGO 750-602 EtherCAT Power Terminal
WAGO 750-430 EtherCAT Terminal (8-Channel Digital Input)
WAGO 750-600 EtherCAT Endmodule
WAGO 852-1322 Ethernet-Switch
24V DC Lab power supply (AC/DC adapter)
A Linux PC (Ubuntu/Debian recommended)
Standard Ethernet cable
24VDC signal source (for testing inputs)

Software

(Installation steps in Section 4)

Rust toolchain
Node-js + npm
Git
QiTech Control repository
EtherCAT HAL (included inside repo)

3. Hardware Setup

⚠️ Safety Warning

Always disconnect power before wiring. Working on live EtherCAT terminals can cause serious damage or electrical shock.

3.1 Safe Wiring Procedure

Insert a screwdriver straight into the square release hole.
Insert the stripped wire into the round opening.
Remove the screwdriver — the spring clamp locks the wire.

3.2 Wiring Steps (Used in This Example)

We supply power to the other devices by using the 750-602 EtherCAT Power Terminal

Perform the following wiring on the Ethernet-Switch:

Red wire (+24V) → PWR+
Black wire (0V) → RPS-

Figure 1 —

3.3 WAGO Wiring the Coupler

Wire the 750-354 EtherCAT Coupler to the power supply:

Red wire (+24V)
Yellow wire (0V)

Figure 2 —

3.4 750-602 EtherCAT Power Terminal Integration

Slide the 750-602 EtherCAT Power Terminal onto the right side of the 750-354 Coupler until it locks.

Perform the following wiring steps:

Green wire (Ground) → Terminal 4
Red wire (+24V) from 750-602 EtherCAT Power Terminal → Terminal 2
Black wire (0V) from 750-602 EtherCAT Power Terminal → Terminal 3
Red wire (+24V) from 750-354 EtherCAT Coupler → Terminal 6
Yellow wire (0V) from 750-354 EtherCAT Coupler → Terminal 7

Figure 3 — Wiring

3.5 750-430 EtherCAT Terminal Integration

Slide the 750-430 EtherCAT Terminal onto the right side of the 750-602 EtherCAT Power Terminal until it locks.

The terminal receives its power through the pin connectors — no additional power wiring is required.

Wiring the Inputs

To test the digital inputs, wire a 24VDC signal to any of the 8 input terminals (e.g., from the power supply to Terminal 4). The input state will be reflected in the QiTech Control Dashboard.

3.6 750-600 Final Assembly

Slide the 750-600 EtherCAT Endmodule onto the right side of the 750-430 EtherCAT Terminal until it locks.

No further wiring is required.

3.7 Power & Ethernet

Power

Connect the 2787-2144 power supply to the power outlet.

Ethernet

Use a standard LAN cable to connect your PC → 852-1322 Ethernet-Switch And another from 852-1322 Ethernet-Switch → 750-354 EtherCAT Coupler

Figure 4 — Ethernet

4. Software Setup

4.1 Installing on Ubuntu/Debian

Paste this into your terminal:

# Press Enter when prompted
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

sudo apt update
sudo apt install -y npm nodejs git

git clone git@github.com:qitechgmbh/control.git
cd control/electron
npm install

4.2 Running the Backend

./cargo_run_linux.sh

This script:

Builds the backend
Grants required system capabilities (raw sockets)
Starts EtherCAT communication

Ensure the WAGO 750-430 is connected.

4.3 Running the Frontend

cd electron
npm run start

This launches the QiTech Control dashboard.

5. Demo

5.1 Assigning Devices in the Dashboard

Once the backend + frontend are running, you should see:

WAGO750-354 (Coupler)
WAGO750-430 (8CH DI)

Steps:

Click Assign on the 750-354 module
Select "Wago 750-430 DI Test V1"
Enter a serial number other than 0
Keep the device role unchanged if it is set to "Wago 750-354 Bus Coupler"
Repeat these steps for the 750-430 module using the same non-zero serial number
Finally, restart the Backend process

5.2 Monitoring the Inputs

In the left sidebar, WAGO 750-430 8CH DI should appear. Click it.

You will see 8 input channels — Di1 to Di8 — each displaying the current state (On/Off).

When a 24VDC signal is applied to an input terminal, the corresponding channel will show On.
When the signal is removed, the channel will show Off.