Addressing - Festo CPX-FB39 Description

3 Commissioning
3.5

Addressing

3.5.1 Basic rules for addressing
– The address assignment of the inputs does not depend on the address assignment of the outputs.
– Counting is byte-wise from left to right, in ascending order without gaps.
Even modules with less than 8 bits occupy 8 bits of address space, but do not use all this space.
– The bus node counts as a module with 0 inputs and 0 outputs when the status bits and the I/O dia­
gnostic interface are deactivated.
Please Note
Address assignment with activated status bits or activated I/O diagnostics interface.
– If the 8 status bits are activated, these occupy the first 16 inputs in the address
range, although only 8 inputs are used.
– If the I/O diagnostics interface is activated, it will occupy the first 16 inputs and
outputs in the address range.
– The inputs and outputs of various different types of module are assigned separately from one an­
other, and the sequence depends on the arrangement of modules in the CPX terminal.
– Input data: S-0-1500.SI.9 (Container Input Data)
– Output data: S-0-1500.SI.5 (Container Output Data).
Please Note
In the Remote I/O operating mode, the bus node must be placed as the first module
(slot 0) to the far left of the CPX terminal.
Festo – P.BE-CPX-FB39-EN – 1504NH – English 35