How to Use С2000-КПБ: Examples, Pinouts, and Specs

The С2000-КПБ, manufactured by Bolid, is a versatile programmable logic controller (PLC) designed for industrial automation applications. It provides a robust platform for controlling machinery, processes, and systems in a wide range of industries. With its flexible input/output (I/O) options and communication interfaces, the С2000-КПБ is ideal for tasks such as process automation, equipment monitoring, and system integration.

• Industrial process control and automation
• Monitoring and controlling machinery in manufacturing plants
• Integration with SCADA (Supervisory Control and Data Acquisition) systems
• Building automation systems (e.g., HVAC, lighting control)
• Remote monitoring and diagnostics of industrial equipment

1. Power Connection: Connect a 24V DC power supply to the +24V and GND terminals.
2. Input Connections:
   • For digital inputs, connect sensors or switches to the DI1-DI8 terminals.
   • For analog inputs, connect devices providing 0-10V or 4-20mA signals to AI1 and AI2.
3. Output Connections:
   • Connect actuators, relays, or other devices to the DO1-DO6 terminals.
4. Communication Setup:
   • Use the RS-485 terminals (A and B) for Modbus RTU communication.
   • For Ethernet-based communication, connect the Ethernet cable to the appropriate terminals (ETH_TX+, ETH_TX-, ETH_RX+, ETH_RX-).
5. Programming:
   • Use the Bolid-provided software to program the PLC according to your application requirements.
   • Configure I/O channels, communication settings, and logic sequences.

• Ensure the power supply voltage is within the specified range (24V DC ±10%).
• Use shielded cables for RS-485 and Ethernet connections to minimize interference.
• Properly terminate the RS-485 bus with a 120-ohm resistor at both ends.
• Avoid exceeding the maximum current ratings for digital outputs to prevent damage.
• Regularly update the firmware to ensure compatibility with the latest features and protocols.

The С2000-КПБ can communicate with an Arduino UNO via the Modbus RTU protocol over RS-485. Below is an example of how to read a digital input from the PLC using the Arduino Modbus library.

#include <ModbusMaster.h>

// Instantiate ModbusMaster object
ModbusMaster node;

// Define RS-485 communication pins
#define RS485_TX 2  // Arduino TX pin
#define RS485_RX 3  // Arduino RX pin
#define RS485_DE 4  // Driver Enable pin

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);

  // Initialize RS-485 communication
  pinMode(RS485_DE, OUTPUT);
  digitalWrite(RS485_DE, LOW); // Set to receive mode
  Serial1.begin(9600, SERIAL_8N1, RS485_RX, RS485_TX);

  // Configure Modbus communication
  node.begin(1, Serial1); // Set Modbus ID to 1
}

void loop() {
  uint8_t result;
  uint16_t data;

  // Read digital input status from С2000-КПБ (address 0x0000)
  result = node.readDiscreteInputs(0x0000, 1);

  if (result == node.ku8MBSuccess) {
    data = node.getResponseBuffer(0);
    Serial.print("Digital Input Status: ");
    Serial.println(data);
  } else {
    Serial.print("Error: ");
    Serial.println(result);
  }

  delay(1000); // Wait 1 second before next read
}

• Use an RS-485 transceiver module (e.g., MAX485) to interface the Arduino with the С2000-КПБ.
• Ensure the Modbus ID and baud rate match the PLC's configuration.

1. PLC Not Powering On:

   • Verify the power supply voltage is within the specified range (24V DC ±10%).
   • Check for loose or incorrect wiring at the power terminals.

2. No Communication via RS-485:

   • Ensure the A and B lines are correctly connected.
   • Verify the Modbus ID, baud rate, and other communication settings.
   • Check for proper termination of the RS-485 bus with a 120-ohm resistor.

3. Digital Outputs Not Working:

   • Confirm the connected load does not exceed the output's current rating.
   • Check the program logic to ensure the output is being activated.

4. Analog Input Readings Are Incorrect:

   • Verify the input signal type (0-10V or 4-20mA) matches the PLC configuration.
   • Check for proper wiring and ensure the signal source is functioning correctly.

Q: Can the С2000-КПБ be used in outdoor environments?
A: The PLC is designed for indoor use. If outdoor installation is required, ensure it is housed in a weatherproof enclosure.

Q: What software is used to program the С2000-КПБ?
A: Bolid provides proprietary software for programming and configuring the PLC. Refer to the manufacturer's website for downloads and documentation.

Q: How many devices can be connected to the RS-485 bus?
A: Up to 32 devices can be connected to the RS-485 bus, including the С2000-КПБ, depending on the network configuration.

Q: Is the С2000-КПБ compatible with third-party SCADA systems?
A: Yes, the PLC supports Modbus RTU and Modbus TCP protocols, making it compatible with most SCADA systems.