Description

The Weintek HMI to Delta PLC MT-DVP communication cable is used to establish a serial communication link between Weintek Human Machine Interfaces (HMIs) and Delta PLCs (e.g., DVP-SS, SA, SC, ES2, EH3, etc.). This cable enables data exchange for monitoring and controlling PLC processes via the HMI. Below are key details:

Key Features

1. Compatibility:

   • Weintek HMIs: Compatible with most models (e.g., MT8000, MT6000, cMT series).

   • Delta PLCs: Works with DVP series PLCs (e.g., DVP-SS, SA, SC, ES2, EH3) that support RS-485 communication.

2. Interface:

   • HMI Side: Typically uses a 9-pin RS-232 or RS-485 port (depending on the HMI model).

   • PLC Side: Connects to Delta PLC’s 8-pin mini-DIN RS-485 programming port.

   • Cable Type: Acts as an RS-232/RS-485 converter to bridge the HMI and PLC protocols.

3. Communication Protocol:

   • Uses Modbus RTU or Delta’s proprietary protocol (configured in the HMI software).

   • Baud rates: 9600, 19200, 38400, etc. (must match PLC and HMI settings).

4. Wiring Configuration:

   • HMI (RS-485):

     • TX+ (Data+): Connects to PLC RS-485+ (Pin 6).

     • TX- (Data-): Connects to PLC RS-485- (Pin 5).

     • GND: Optional shielding (Pin 9 on HMI to PLC Pin 3).

   • Delta PLC 8-pin mini-DIN:

     • Pin 5: RS-485- (B)

     • Pin 6: RS-485+ (A)

     • Pin 3: GND (optional).

5. Software Setup:

   • Weintek HMI: Configure communication settings in EasyBuilder Pro:

     • Driver: Delta PLC DVP Series (Modbus RTU).

     • Port type: RS-485 2-wire.

     • Baud rate, parity, data bits (match PLC settings).

   • Delta PLC: Ensure PLC communication parameters align with the HMI (set via programming software like ISPSoft).

Typical Applications

• Real-time data monitoring (e.g., sensor values, status bits).

• Control of PLC outputs (e.g., buttons, switches via HMI).

• Alarm management and historical data logging.

Setup Steps

1. Hardware Connection:

   • Connect the HMI’s RS-485 port to the Delta PLC’s 8-pin mini-DIN port using the MT-DVP cable.

   • Verify wiring polarity (A+/B- or TX+/TX-).

2. Software Configuration:

   • On the HMI:

     • Select Delta DVP (Modbus RTU) as the PLC driver.

     • Set the correct COM port, baud rate, station number (PLC address).

   • On the PLC:

     • Use Delta software (e.g., ISPSoft) to configure the PLC’s communication parameters (baud rate, parity, etc.).

3. Testing:

   • Use the HMI’s “Communication Test” tool to verify connectivity.

   • Monitor PLC registers (e.g., D, M, Y addresses) on the HMI.

Troubleshooting Tips

• No Communication:

  • Check wiring polarity (swap A+/B- if necessary).

  • Ensure matching baud rates and parity settings.

  • Verify the PLC station address in the HMI configuration.

• Intermittent Data:

  • Add a 120Ω termination resistor on the RS-485 line (if long-distance).

  • Shield the cable and ground the shield at one end.

Alternatives

• Ethernet Communication: Use a Delta DVP-EN01 Ethernet module with Weintek HMI (for faster, long-distance communication).

• USB-to-RS-485 Adapters: If the HMI lacks RS-485 ports.