Siemens SIMATIC NET CP 343-2, Manual

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5 Using the Command Interface
61
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Byte Meaning
q+0 Command number
q+1 Job data
q+... Job data
q = base address of the send buffer on the DP master
General Structure of the Receive Buffer
The basic structure of the response buffer is shown below. The bytes only relevant
with certain commands are shown on a gray background.
Byte Meaning
n+0 Response data
n+1 Response data
n+... Response data
n = base address of the response buffer on the DP master
General Structure of the AS-i Slave Address
If an AS-i slave is addressed in a command or in a response, the address is
structured as shown below:
Bit 7 Bit 6 Bit 5 Bit 4 Bit 0
S bit Slave address
Where the S(elect) bit for selecting the slave type is specified as follows:
S S bit = 0
Standard AS-i slave or AS-i slave with extended addressing mode in address
area A
S S bit = 1
AS-i slave with extended addressing mode in address area B