Fieldbus Protocols

Fieldbus Protocol Support

The H1.M300 has 4 serial RS485 interfaces (Serial Port 1 to 4). No expansion slot is available.

Supported fieldbus protocols

• Modbus
• Transparent Mode
• Application usage (CODESYS, Node-RED, etc.)

Switching between Modbus and Transparent Mode

1. Enable Advanced Mode

   • Click the gear icon ("Settings") in the top right.
   • Enable "Advanced Mode".
2. Access to new applications

   • Open the "Applications" menu.
   • You should now see two new, non-uninstallable applications:

     • Modbus Mode
     • Transparent Mode
3. Select the mode for each port

   • Navigate to the "Serial Settings" menu.
   • Find the "Fieldbus" section.
   • Select the desired mode for each port:

     • Modbus Mode
     • Transparent Mode

Important notes

• The new applications (Modbus Mode and Transparent Mode) are permanently integrated into the system and cannot be uninstalled.
• You can flexibly decide which port uses which mode.
• The Transparent Mode enables the use of serial interfaces over the network, which is particularly advantageous for applications in building automation and industrial control.