Profisafe; Profisafe Safety Profile - Festo CPX Series Description

1. System overview CPX-F8DE-P
1.2

PROFIsafe

1.2.1 PROFIsafe safety profile

2
1
1
Standard telegram with embedded
PROFIsafe data
2
Embedded PROFIsafe telegram
Fig. 1/3: Telegram structure of the input module CPX-F8DE-P
1-12
Data are exchanged between the input module and the safety
controller with the safety-related PROFIsafe bus profile from
PROFIBUS or PROFINET IO.
The PROFIsafe telegrams are embedded in standard
telegrams and are directed via the so-called black channel
from the safety controller to the input module. The black
channel extends from the field bus connection on the safety
controller via the bus node to the input module CPX-F8DE-P
è Fig. 1/2. The PROFIsafe telegrams are processed there by
the input module.
In addition to process data, the PROFIsafe telegrams also
transmit safety information. Therefore, the CPX-F8DE-P
assigns 6 bytes in the input image and 7 bytes in the output
image of the CPX terminal è Fig. 1/3; 3, 4, 5.
2
3
3
4
5
1 3
4 5
2 bytes for F usage data from the
module
3 bytes for F usage data to the module
1 byte status or control byte
3 bytes CRC signature (CRC2)
Festo CPX-F8DE-P-EN en 2005b English