Siemens SIMATIC NET DP/AS-i Link 20E Manual page 78

Using the Command Interface
3.3.4 Read_Parameter
Purpose
This call returns the current parameter value (actual parameter) of an AS-i slave
sent by the DP/AS-i Link 20E.
This value must not be confused with the parameter echo that is supplied by the
AS-i slave as a response to the write_parameter job.
Structure of the Job Data in the Send Buffer
Byte
0
1
Structure of the Response Data in the Receive Buffer
Byte
Bit 7
0
78
Meaning
Command number: 03
Slave address
Meaning
Bit 4 Bit 3
reserved
H
Bit 0
Parameter
DP/AS-Interface Link 20E
Release 08/2008
C79000-G8976-C235−01