The CAS Modbus RTU Parser by Chipkin Automation Systems is a free utility used to decode raw hexadecimal byte streams from serial communication into a human-readable format. It allows field technicians to isolate, analyze, and diagnose payload-level errors on an industrial network. 🛠️ Step 1: Capture Raw Data
Before parsing data, you must extract the problematic Hex strings from your RS-485 or RS-232 serial bus.
Connect your PC to the serial bus using a USB-to-RS485 converter.
Open a serial terminal, diagnostic software, or traffic logger (such as the legacy CAS Modbus Scanner or the modern Chipkin Modbus Explorer).
Copy the exact hexadecimal frame causing communication time-outs or bad data reads. Example raw stream: 01 03 00 00 00 02 C4 0B 💻 Step 2: Feed the Parser
Translate the raw hex values into clear industrial protocol components. Open the CAS Modbus RTU Parser utility.
Paste the copied hexadecimal byte sequence into the input field.
Click Parse or Analyze to automatically break down the message. 🔍 Step 3: Analyze the Field Components
The tool breaks the binary stream into the explicit structure mandated by the Modbus protocol specification: CAS Modbus Scanner – Discover & Test Modbus Devices
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