Address Assignment - Festo CPX Series Manual

2. Commissioning
2.2

Address assignment

Festo P.BE−CPX−PN IO−EN en 1008b
Note
The address space of a CPX terminal in the PROFINET
network is limited.
The CPX bus node for PROFINET provides the CPX terminal
with an address space of up to 64 bytes for inputs (I) and
64 bytes for outputs (O).
Each module of the CPX terminal occupies a certain
number of I/O bits, bytes or words in the context of
module communication.
Please refer to the following tables (Tab. 2/2 to Tab. 2/7)
for the number of I/O bytes occupied (of the respective
module).
Also, certain functions, e.g. the I/O diagnostics interface
(STI), reduce the number of available I/O bytes (in favour
of status or diagnostics functions).
Take account of this fact for the planning of your CPX
terminal.
Before starting up or configuring the CPX terminal, determine
the number of assigned inputs and outputs. Tab. 2/8 assists
you with this.
Use the configuration documents, the handheld control unit
(CPX−MMI) or the Festo Maintenance Tool (CPX−FMT) to
determine address assignment or terminal configuration.
In the handheld display, the individual modules of the CPX
terminal are displayed with the respective module identifiers.
Using the module identifier and the following tables, you can
determine the module type and, with it, the number of inputs
and outputs occupied by the module.
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