Siemens SINAMICS G110D Operating Instructions Manual page 152

Functions
6.11 Operation in fieldbus systems
Figure 6-36
Serial data transfer
The CTT2 protocol allows both cyclic and acyclic serial data to be transferred between
master and slave. The commands implemented to achieve this are as shown in the table
below.
Table 6- 60 CCT2 commands
Code (dec) Code (hex)
0 0x00
1 0x01
16 0x10
80 0x50
144 0x90
17 0x11
81 0x51
145 0x91
18 0x12
82 0x52
146 0x92
19 0x13
83 0x53
147 0x93
29 0x1D
93 0x5D
157 0x9D
152
PWE component structure
Command/Response
Read cyclic data from slave
Write cyclic data to slave
Standard read request
Standard read response ok
Standard read response error
Standard write request
Standard write response ok
Standard write response error
Vendor specific read request
Vendor specific read response ok
Vendor specific read response error
Vendor specific write request
Vendor specific write response ok
Vendor specific write response error
Vendor specific exchange request
Vendor specific exchange response ok
Vendor specific exchange response error
Followed by
4 byte PWE data
4 byte PWE data
Index, length
Data
Standard error code
index, length, data
Standard error code
index, length
data
error object
Index, length, data
error object
index, read length, write
length, write data
read data
error object
Operating Instructions, 2009-05-15, A5E02385577A AB
SINAMICS G110D