Process Image (I/O Image) - Festo CPX Series Description

1. System overview CPX-F8DE-P

1.2.2 Process image (I/O image)

Festo CPX-F8DE-P-EN en 2005b English
Data are transmitted on the same physical basis as the
transfer of process data to a standard module. There is
a distinction between the kind of data and the interpretation
of that data by the F-Device (PROFIsafe slave).
The following applies for PROFIsafe communication in
connection with the input module CPX-F8DE-P:
– the module supports the PROFIsafe V2.4 bus profile in the
V2 mode
– parameterisation to V1 mode is rejected.
The safety features of PROFIsafe mean that the input module
CPX-F8DE-occupies 7 bytes for outputs and 6 bytes for inputs
in the process image of the CPX terminal.
Outputs consist of:
3 bytes of output data (F usage data, è Tab. 1/7)
–
– 1 control byte (for PROFIsafe communication)
– 3 bytes CRC (for PROFIsafe communication).
Inputs consist of:
2 bytes input data (F usage data, è Tab. 1/8)
–
– 1 status byte (for PROFIsafe communication)
– 3 bytes CRC (for PROFIsafe communication).
Function modes are set via the output data from the input
module.
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