Pepperl+Fuchs AS-I 3.0, Manual, Page: 95 / 177

95
Is
s
u
e
d
a
te
:
7
.6
.2
0
1
3
AS-i 3.0 Command Interface
Commands of the Command Interface
4.7.6 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
submit 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
executed.
In the offline mode, the AS-i Master processes jobs by the user only. (Jobs that in-
volve 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 Master 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
Tab. 4-177.
Response
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1 0A
16
2 T result
Tab. 4-178.