Communication \ with Modbus® RTU and Modbus® TCP/IP

• Protocol description
• Modbus RTU with the serial \ interfaces COM1 and COM2
• Modbus on TCP/IP via Ethernet
• Modbus addresses
  • Modbus address table
  • Peculiarities for accessing Modbus addresses
  • Comparison between AC500 and AC31/S90 Modbus \ addresses
• Modbus telegrams
• Function block COM_MOD_MAST