Festo CPX-FB13, Manual

Page: 29 / 63

4 Commissioning
Festo – P.BE-CPX-CTEL-EN – 1411a – English 29
Distribution of the assigned addresses to the I-ports is individually possible in the auto­
matic configuration. That is, an individual I/O length between 1 byte and 32 bytes can be
assigned to each I-port for determination of the sum of the I/O bytes.
But the sum of the bytes available in total remains 32 bytes. That means, if the 32 bytes
are issued to an I-port, no more I/Os are available for the other three I-ports.
Communication with the host system
To make a connection set-up between the CPX terminal and higher-order controller possible, it must be
ensured that the automatically determined configuration presetting of the CTEL master module agrees
with the respective entry of the corresponding fieldbus configuration file (
è
3.6).
4.1.3 Address assignment in the CPX system
I/O bytes are assigned in the CPX system corresponding to the selected configuration presetting.
The assigned address spaces are thereby filled “from below”, that is, the starting point is the least
significant address (LSB). The unused MSBs expire.
The distribution of the device addresses to the address space of the CTEL master module in the ex­
amples from sections 4.1.1 and 4.1.2 would look as follows: