PROFIsafe 201
Status Byte and CRC2 bit order
PROFIsafe messages sent from the FSO module to the safety PLC include the
F-Input user data, the Status Byte and CRC2.
This table shows the bit order of the Status Byte and CRC2.
N
i
is the length of F-Input user data.
FSO PROFIsafe profiles
The content of the F-Input and F-Output user data is configured with FSO specific
PROFIsafe profiles. The FSO-21 module supports the ABB_PS1 and ABB_PS2
profiles.
The ABB_PS1 profile provides the functionality to control and monitor the safety
functions, the SLS limits, the safe speed value and the states of the FSO I/O. In
addition to the functionality in the ABB_PS1 profile, the ABB_PS2 profile includes the
safe position data. The ABB_PS2 profile requires that an encoder is used in the
safety system.
Octet Bit Name Description
Status Byte
N
i
7 Reserved The value is always 0. Must be ignored by the F-Host.
6 cons_nr_R Vconsnr_d has been reset.
5 Toggle_d Toggle bit
4 FV_activated Fail-safe values (FV) activated.
3 WD_timeout Communication fault: Watchdog timeout
2 CE_CRC Communication fault: CRC error
1 Device_Fault Failure exists in the F-Device.
0 iPar_OK F-Device has new iParameter values assigned.
Not in use. The value is always 0.
CRC2
N
i
+1 7 CRC bit 23 Octet 3 (MSB) of 24 bit CRC
…
0 CRC bit 16
N
i
+2 7 CRC bit 15 Octet 2 of 24 bit CRC
…
0 CRC bit 8
Ni+3 7 CRC bit 7 Octet 1 (LSB) of 24 bit CRC
…
0 CRC bit 0
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