Description

The IS4310 is a chip that integrates a Modbus RTU Slave stack. It features an internal memory of 500 Holding Registers, accessible by both a microcontroller (via I2C) and a Modbus Master device (e.g., PLC, computer, etc.).

The goal of the IS4310 is to eliminate the engineering effort typically required to implement and validate Modbus RTU communication. It offers a reliable, ready-to-use solution that helps reduce development time and speed up your time-to-market (TTM).

How it Works?

The chip provides two interfaces:

• An I2C interface for your microcontroller, FPGA, Arduino, Raspberry Pi, etc.
  ➜ This is where your system reads/writes Modbus data.

• A UART output to connect your preferred RS485 (or RS232, RS422) transceiver.
  ➜ This is the fieldbus that connects to a PLC, computer, or machine.

The internal memory is composed of 504 registers: - 500 Holding Registers for user data. - 4 Configuration Registers for communication settings.

You can use the IS4310 in two main modes:

• As a Sensor → your microcontroller writes data to the chip via I2C.
• As an Actuator → your microcontroller reads data from the chip via I2C.

➡️ Just read/write the registers you need — no protocol stack required.

Default Chip Settings

Default Modbus Settings:

• Modbus Slave ID: 1

• Modbus Baud Rate: 19200 bps

• Modbus Parity: Even

• Modbus Stop Bits: 1

Default I2C Settings:

• I2C Slave Address: 0x11 (fixed)

• I2C Speed: 100 kHz (when pin 7 is tied to GND)

Download Code Examples

• Modbus Sensor with Arduino
  🔗 IS4310 Arduino Sensor Example

• Modbus Actuator with Arduino
  🔗 IS4310 Arduino Actuator Example

Download Software

• qModMaster: Modbus RTU Master Software
  🔗 Download qModMaster

Download Documentation

• 📘 Online Wiki: https://inacks.gitbook.io/is4310-wiki
• 📄 Datasheet: Available at www.inacks.com/is4310

Need an Evaluation Board?

The Kappa4310Ard is an Arduino-form-factor evaluation board that lets you prototype and play with the Modbus chip IS4310 over RS485.

You can get it also on Tindie: https://www.tindie.com/products/inacks/evaluation-board-for-is4310/

For more information about the Evaluation Board you can also check: www.inacks.com

Product Packaging

📦 Reels available for high-volume orders.

Questions?

💬 Contact us anytime for support.