Direct diagnostics via LEDs on the fieldbus node
Replacement of modules when wiring is up
Manages expansion modules with 1, 2, 4, 8 and 16 channels
Simple termination (no resistor or end module required)
Free combination of digital and analog I/Os and special functions
The fieldbus node NA9122 as slave establishes the connection between the FnIO system and the PROFIBUS fieldbus.
The I/O modules used are automatically detected and the fieldbus node creates a local process image. The sequence of the analog expansion modules (data exchange word by word) and digital expansion modules (data exchange bit by bit) is arbitrary and can be mixed. The internal process image of the NA9122 fieldbus node is stored in the memory of the relevant controller via the PROFIBUS fieldbus. By subdividing the process image into an input and output data area, the process data is read in via the PROFIBUS, processed further in a controller and the process output data output via the PROFIBUS.
The automatically generated process image is created in your slots in the order of the expansion modules.
The bits of the digital expansion modules are summarized to bytes and attached to the analog data. If the number of digital I/Os exceeds 8 bits, another byte is started by the fieldbus node.
Wachendorff, NA9122, Profibus DP/V1, plcs, plc, programmable logic controller
