AS-Interface
Command Interface
Subject to reasonable modifications due to technical advances.
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12.
8.
2007
102
10.3.6.6
Set offline mode (SET_OFFLINE)
This call switches between online and offline mode.
The online mode is the normal operating state for the AS-i master. The following
jobs are processed cyclically:
• During the data exchange phase, the fields of the output data are transferred to
the slave outputs for all AS-i slaves in the LAS. The addressed AS-i slaves sub-
mit the values of the slave inputs to the master when the transfer was free of
errors.
• This is followed by the inclusion phase in which existing AS-i slaves are
searched and newly added AS-i slaves are entered in the LDS or LAS.
• In the management phase, jobs by the user such as writing parameters are ex-
ecuted.
In the offline mode, the AS-i/PROFIBUS Gateway processes jobs by the user only.
(Jobs that involve the immediate addressing of an AS-i slave are rejected with an
error). There is no cyclic data exchange with the AS-i slaves.
When offline, the AS-i circuit is in a safe state.
The OFFLINE = TRUE bit is not permanently stored; in other words, following a
cold/warm restart, the AS-i/PROFIBUS Gateway is once again in the online mode.
The master changes to the offline phase, if there is a 1 written in byte 3.
The master will change to online mode if there is a 0 written in byte 3.
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
0A
16
2
T
–
circuit
3
Off-Line
Response
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
0A
16
2
T
result
