Modbus Extension CardΒΆ

Modbus Extension Card for Bithouse Integral controller provides 2 modbus buses per card. When a card is installed in the Integral controller, two new serial devices will be added by the operating system. The serial devices can be referred by custom names that are determined by the slot the card has been installed. All internal Extension Cards will appear under /dev/slots/internal/.

Note

Here internal installation means that the card has been installed to one of the six slots available in Integral controller

The predictable name will use following pattern:

M[slot number]_RS485_[bus number]

Example1:

  • Modbus Card has been installed in the first slot (Slot 1) and we want to use the first bus, the device in ioPort device field would be /dev/slots/internal/M1_RS485_1

Example2:

  • Modbus Card has been installed in the fourth slot (Slot 4) and we want to use the second bus, the device in ioPort device field would be /dev/slots/internal/M4_RS485_2

See ioPorts for more information about ioPorts