Structure Of The Profibus-Dp Data Telegram - Pepperl+Fuchs VAG-PB-KF-R4 Manual

Bit 7: Offline_Ready
11.3

Structure of the Profibus-DP Data Telegram

11.3.1 Structure of the AS-i data window
byte 0
slave 1 AS-i flags
with K = number of AS-i slaves + 1 (the AS-i flags are always additionally transmitted)
N = K/2
Bit allocation by slave 3 and slave 2 in byte 1
bit 7 bit 6
slave 3
D3 D2
Bit allocation by slave (K-1) and slave (K-2) in byte (N-1)
bit 7 bit 6
slave (K-1)
D3 D2
The following AS-i Master flags are transmitted in the I/O field of the DP data telegram
in place of the input data of slave 0:
Bit 0 (Config_OK):
Bit 1 (APF, AS-i power fail):
Bit 2 (Normal_operation_active):
Bit 3 (Configuration_active):
The following AS-i Master flags are transmitted in the I/O-field of the DP data telegram
in place of the output data of slave 0:
If the AS-i flags shall not be used you have to make sure that these four
bits in the I/O-field are set to zero!
Subject to reasonable modifications due to technical advances.
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Appendix: AS-i Slave Lists and Data Telegrams
...
... slave(K-1) slave(K-2)
byte 1
bit 5 bit 4 bit 3
D1 D0 D3
byte (N-1)
bit 5 bit 4 bit 3
D1 D0 D3
0 = configuration OK
1 = configuration error
0 = power supply on AS-i sufficient
1 = power supply on AS-i insufficient
0 = normal operation active
1 = normal operation not active
0 = protected mode
1 = configuration mode
off-line mode active
byte N-1
bit 2 bit 1
slave 2
D2 D1
bit 2 bit 1
slave (K-2))
D2 D1
AS-Interface
bit 0
D0
bit 0
D0
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