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Command Interface

5-23

SIMATIC NET CP 243-2 AS-i Master

C79000-G8976-C142/02

5.2.11 Set_Offline_Mode

Purpose

This call switches between the online and offline mode.

The online mode is the normal situation for the CP 243-2. Here, 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 slaves in the LAS. The addressed slaves transfer 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 there is a search for the existing

AS-i slaves and newly added AS-i slaves are entered in the LDS or LAS.

 In the management phase, jobs from the user such as writing parameters are

executed.

In the offline mode, the CP 243-2 only processes jobs from the user. (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.

The OFFLINE=TRUE bit is not permanently stored; in other words, following a

warm/hot restart, the CP 243-2 is once again in the online mode.

Structure of the Job Data in the Send Buffer

Bank Byte Meaning

Bit 7 Bit 1 Bit 0

2 0 Command number: 0A

2 1 reserved Mode

(0=online

1=offline)

Structure of the Job Data in the Receive Buffer

Bank Byte Meaning

2 0 Echo of the command number: 0A

2 1 Command status

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 149 150

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