Siemens CP 243-2 User Manual
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.
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