Siemens DP/AS-Interface Link 20E, Руководство пользователя

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Using the Command Interface
84
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
3.3.3 Write_Parameter
Purpose of the Command
The AS-i slave parameter value transferred with the command is passed on to the
addressed AS-i slave.
The parameter is stored on the DP/AS-i Link 20E only temporarily and is not
entered as a configured parameter in the EEPROM!
The AS-i slave transfers its current parameter value in the response (parameter
echo). This can deviate from the value that has just been written according to the
AS-i master specification (/2/). The AS-i slave response is returned as a parameter
echo in the response data.
This call is not permitted for AS-i slaves that comply with the AS-i slave standard
profile 7.4. For these slaves, the AS-i master handles the AS-i slave parameter
assignment itself.
Structure of the Job Data in the Send Buffer
Byte Meaning
Bit 7 Bit 4 Bit 3 Bit 0
0 Command number: 02
H
1 Slave address
2 irrelevant Parameter
Structure of the Response Data in the Receive Buffer
Byte Meaning
Bit 7 Bit 4 Bit 3 Bit 0
0 reserved Parameter echo