QA Modbus Master

🔗 QA Modbus Master

QA Modbus Master is an essential central application designed to manage communication on the RS485 ModbusRTU bus in Master–Slave mode.
This tool serves as the brain of the entire system, ensuring coordinated data exchange between multiple Slave-type devices connected on a single shared communication line.
The application effectively eliminates the risk of collisions and ensures stable data reading even in larger installations.

💼 Business Presentation

An ideal solution for complex energy management systems requiring connection of multiple measurement points to a single RS485 bus.
QA Modbus Master acts as a "conductor" that sequentially addresses individual slave applications (e.g., for Eastron electricity meters), enabling system scalability without the need to increase the number of physical converters.
With this solution, you gain a robust and clear architecture that saves costs on hardware and configuration time.

📊 Analysis and Data Processing

For clear visualization, work with measurement history, and graphs, we recommend integration with SCADA Mervis.

🧪 TRIAL – Trial Version

Verify the functionality of QA Modbus Master in your system.
TRIAL version unlocks full functionality for 2 days.
Download here: ⬇️ Download trial version

⚠️ Note

The application communicates via RS485 -> ModbusTCP converter and requires installed Slave-type applications for its operation.
Important: The data reading frequency must be adapted to the total number of devices on the bus.
With a higher number of devices (e.g., 10+ electricity meters), timing intervals must be set so that the Master can handle all requests in real time without saturating the line.

⚙️ Key Features

✅ Collision-free Orchestration

• Operation Management: Ensures that only one device communicates at a time, preventing data errors.
• Support for Multiple Slave Applications: Full compatibility with applications such as QA EastronSDM230ModbusSlave or QA EastronSDM630ModbusSlave.
• Central Management: Single interface for monitoring activity across the entire ModbusRTU bus.
• Stability: Robust retry mechanism for brief communication failures.

✨ Typical Use Cases

• Multi-point Measurement: Operation of multiple electricity meters (e.g., for individual apartments or machines) on a single RS485 line.
• Combined Devices: Simultaneous data reading from electricity meters, temperature sensors, and inverters on a single bus.
• Industrial Automation: Central data collection from various ModbusRTU peripherals into a single master system.

🔌 Operating Requirements

• ModbusTCP/ModbusRTU communication gateway.
• Installed corresponding QA Slave applications for specific connected devices.
• Correct physical bus wiring (appropriate cabling, termination, unique Modbus addresses).
• Appropriately selected polling rate (query interval) in settings.

🧰 Setup and Configuration

• Definition of IP address and port of ModbusTCP converter.
• Assignment of individual Slave devices under this Master element.
• Timing optimization (timeout, delays between queries) for smooth line operation.

🌍 Language Support

🇨🇿 Czech 🇬🇧 English