QElectroTech Electrical Schematic For simple PLC+VFD control

Design a simple control panel for controlling a VFD. Panel includes a S7-1200 PLC that may control the VFD by modbus. Provide hardwired controls to override PLC. Provide E-stop relay. VFD uses STO function to accept input from safety relay.

BOM is a guide, appropriate part numbers need to be chosen. We expect this to be drawn in QElectrotech, and to have appropriate BOM and panel layout captured in QET, provide drawing, BOM and QET symbols.

Proposing freelancer MUST provide example of a prior completed QET project. Please do not propose unless you can provide this.




Control Panel Electrical Design – Specification
1. Power Distribution
- Incoming supply: 3~ 400 V + PE + N
- QF1 – Mains isolator, 3‑pole.
- QF2 – Type‑B RCD.
- QF3 – MCB (3‑pole) for VFD.
- QF4 – MCB (1‑pole) for 24 V PSU.
- G1 – 24 VDC PSU.
2. Motor & Drive
- M1 – 4 kW 400 V motor.
- G2 – WEG CFW500 VFD with STO Module (G2.1).
3. Safety System
- SF1 – Pilz safety relay.
- S1 – Panel E‑stop.
- S2 – External E‑stop.
- S3 – Guard door switch.
- PB1 – Reset pushbutton.
4. Manual Controls
- SW1 – Hand/Off/Auto selector.
- SW2 – Forward/Reverse selector.
- POT1 – Speed potentiometer.
- PB2 – Jog pushbutton.
5. Sensors & Outputs
- S4 – Motor prox sensor.
- Y1 – 24 V sounder.
- Y2–Y4 – Spare outputs.
6. PLC & Communications
- A1 – S7‑1200 CPU.
- A1.1 – CM1241 RS‑485.
- A2 – HMI panel.
7. Terminal Strips
- X1 – Power & 24 VDC
- X2 – Motor
- X3 – Safety Devices
- X4 – Sensors / I/O
Bill of Materials (BOM). See Attachment..