Siemens CP 243-2 - Manual (Page 83)

Command Interface
5-15
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
5.2.3 Write_Parameter
Purpose of the Command
The AS-i parameter value transferred with the command is passed on to the
addressed AS-i slave.
The parameter is stored on the CP 243-2 only temporarily and is not entered as a
configured parameter in the EEPROM!
The AS-i slave transfers its current parameter value in the reply (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 supplied as a parameter
echo in the receive buffer.
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
Bank Byte Meaning
Bit 7 Bit 4 Bit 3 Bit 0
2 0 Command number: 02
H
2 1 AS-i slave address
2 2 irrelevant Parameter
Structure of the Job Data in the Receive Buffer
Bank Byte Meaning
Bit 7 Bit 4 Bit 3 Bit 0
2 0 Echo of the command number: 02
H
2 1 Command status
2 2 Parameter echo