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Command Interface

5-54

SIMATIC NET CP 243-2 AS-i Master

C79000-G8976-C142/02

5.2.28 Write_AS-i_Slave_Parameter_String

Purpose

With this call, a parameter string complying with AS-i slave profile 7.4 can be sent

to the AS-i master that passes on the string to the AS-i slave address specified in

the send buffer.

With this call, a send buffer with a maximum of 223 bytes is transferred to the AS-i

master. The actual number of parameter bytes to be sent to the AS-i slave is

calculated by the AS-i master from byte 2 of the send buffer (number of parameter

bytes).

The information in the string is not evaluated by the AS-i master and is passed on

to the AS-i slave transparently.

As long as the string transfer is active, there is no user/analog data exchange with

the addressed AS-i slave.

Structure of the Job Data in the Send Buffer

Bank Byte Meaning

2 0 40

2 1 Slave address

2 2 Number of parameter bytes

2 3 String byte (1)

2 4 String byte (2)

... ... .....

... ... String byte (n–1)

... ... String byte (n)

Maximum value for n=220

Structure of the Job Data in the Receive Buffer

Bank Byte Meaning

2 0 Echo of the command number: 40

2 1 Command status

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 149 150

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