Siemens SINAMICS CU240S DP-F - Page 142

Communication
6.3 Acyclic Communication
Control Units CU240S
142 Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
● Parameter address
Addressing of a parameter. If several parameters are accessed, there are
correspondingly many parameter addresses. The parameter address appears only in the
request, not in the response.
● Parameter value
Per addressed parameter, there is a segment for the parameter values. Depending on
the request ID, parameter values appear only either in the request or in the reply.
Table 6-21 Parameter request
Word
Byte Byte
Request Reference Request ID Request header
Drive object ID No. of Parameters
Attribute No. of elements
Parameter Number (PNU)
1
st
Parameter Address
Subindex
…
Attribute No. of elements
Parameter Number (PNU)
n
th
Parameter Address
Subindex
Format No. of Values
Values
1
st
Parameter Value(s)
(only for request
"Change parameter")
…
…
Format No. of Values
Values
n
th
Parameter Value(s)
…
Table 6-22 Parameter response
Word
Byte Byte
Request Reference mirrored Response ID Response header
Drive object ID mirrored No. of Parameters
Format No. of Values
Values or Error Values
1
st
Parameter Value(s)
(only after request "Request")
…
…
Format No. of Values
Values or Error Values
n
th
Parameter Value(s)
…