No. 0A: Set_Offline_Mode - Siemens SIMATIC ET 200SP Manual

9.4.11

No. 0A: SET_Offline_Mode

Meaning
This command switches between online and offline mode.
Online mode is the normal mode for the AS-i master. The following jobs are processed in
online mode:
1. In the data exchange phase, the fields of the output data are transferred to the slave
outputs for all AS-i slaves of the LAS. In error-free transmission, the addressed
AS-i slaves transfer the values of the slave inputs to the master.
2. In the loading phase, a search is conducted for the existing AS-i slaves. Newly added AS-
i slaves are inserted in the LDS or LAS.
3. In the management phase, jobs forwarded by the user, such as writing parameters, are
executed.
In offline mode, the AS-i master only processes jobs from the user. Jobs that immediately
activate an AS-i slave are rejected with an error. Cyclic data exchange is not performed with
the AS-i slaves.
The bit OFFLINE=TRUE is not stored permanently. This means that after startup or restart,
the AS-i master is in online mode again.
Structure of the job data in the send buffer
Table 9- 22 Structure of the job data in the send buffer
Byte
Bit 7
0
1
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004
Meaning
Command number: 0A
H
0
Using the command interface
9.4 Description of the AS-i commands
Bit 1
0 = Online
1 = Offline
Bit 0
Mode
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