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Festo — CPX-F8DE-P — 2022-10d
System overview CPX-F8DE-P
Byte
Bit 7
Bit 6
Bit 5
Bit4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
E3
E1
0
0
E2
E0
1
1
1
1
1
1
1
1
1
Tab. 17: Input image; example for channel pairs E0/E1 and E2/E3
2.2.4
Channel-based passivation
“Channel-based passivation” can be switched on or off via bit 1 of byte 0 for output data (PAA)
Tab. 15 Bit pattern of the output data (F-user data, bytes 0, 1 and 2).
Channel-based passivation disabled
While this function is disabled (0 = Off), in accordance with PROFIsafe specification and even if there
is only one channel error, the input module switches all information on the input image to the safe
state (= module-based passivation).
–
All inputs = 0
–
All qualification bits = 0
Passivation in the event of an error is based on PROFIsafe specification.
For troubleshooting:
• Note diagnostic messages from module in the F-Host.
Channel-based passivation enabled
If this function is enabled (1 = On) and there is a channel error, the input module switches the input
information of the affected channel pair to 0, depending on the function mode.
The input information of unaffected channel pairs does not change and the input module remains
integrated.
The input module indicates the current channel error status to the controller via the input image:
–
All input bits relating to the channel bundle = 0
–
All qualification bits relating to the channel bundle = 0
Acknowledgment sequence
When using the channel-based passivation, the acknowledgment is made with the help of the safety
program via bit 0 from byte 0 of the output data (PAA)
Tab. 15 Bit pattern of the output data (F-user
data, bytes 0, 1 and 2).
The following description of the sequence shows the bits in the input and output image of the input
module that are relevant to channel-based passivation.
No.
Sequence
Channel-
based passi-
vation
1)
Electrical
status at
input
Status in the
input
image
2)
Qualification
bit
2)
Acknowledg-
ment of the
channel
error
1)
1
Module is not passi-
vated
1 (active)
X
X
1
0
Channel error occurs
