Siemens CP 243-2 - Manual (Page 84)

Command Interface
5-16
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
5.2.4 Read_Parameter
Purpose
This call returns the current parameter value (actual parameter) of a slave.
This value must not be confused with the parameter echo that is supplied by the
AS-i slave as a reply to the write_parameter job.
Structure of the Job Data in the Send Buffer
Bank Byte Meaning
2 0 Command number: 03
H
2 1 AS-i slave address
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: 03
H
2 1 Command status
2 2 irrelevant Parameter