Danfoss VLT PROFIBUS DP MCA 101 User Manual

PROFIBUS DP-V1 telegram for read/write from or to a
frequency converter parameter:
PROFIBUS
telegram
header
Data unit PROFIBUS
telegram
trailer
DP-V1
command/response
PROFIdrive V3.0
parameter
channel
DU
0
DU
1
DU
2
DU
3
Req./Res.
Header
Data
Table 5.5 Structure of the PROFIdrive Parameter Channel
Table 5.6 shows the principle structure of the PROFIdrive
parameter channel.
The DP-V1 parameter request telegram consists of 3 data
blocks:
•
A request header, which denes the request (read
or write), and the number of parameters to
access. The master sets the request reference, and
uses this information to evaluate the response.
•
An address eld where all addressing attributes of
the wanted parameters are dened.
•
A data eld where all parameter data values is
placed.
DP-V1 Parameter request Byte number
Request
header
Request reference 0
Request ID 1
Axis 2
Address eld Number of parameters 3
Attribute 4
Number of elements 5
Parameter number 6
7
Sub index 8
9
n'th parameter number 4+6*(n-1)
...
Data eld Data format 4+6*n
Number of values (4+6*n)+1
Values (4+6*n)+2
n'th data value ...
Table 5.6 Principle Structure of the PROFIdrive Parameter
Channel
The DP-V1 parameter response telegram consists of 2 data
blocks:
•
A response header, which indicates:
- If the request is performed without
errors (response ID).
- The number of parameters.
- The request reference set by the master
within the corresponding request.
•
A data eld, where the requested data are placed.
If 1 or more internal requests have failed, a fault
code is placed instead of the data values.
DP-V1 Parameter response Byte
number
Response header Request reference mirrored 0
Response ID 1
Axis mirrored 2
Parameter values Number of parameters 3
Format 4
Number of values 5
Values of error values 6
n'th parameter value ...
Table 5.7 DP-V1 Parameter Response Telegram
As the response telegram does not include parameter
addressing information, the master must identify the
structure of the response data from the request telegram.
5.2.9 Request/Response Attributes
Table 5.8 contains an overview of the possible attributes of
the PROFIdrive parameter channel.
Field Data
type
1)
Values Remark
Request
reference
U8 0x01–0xFF – –
Request ID U8 0x01 Request
parameter value
Identication
of read or
write request
0x02 Change
parameter value
0x42 Change
parameter non-
volatile
0x51 Request
parameter value
double word
0x52 Change
parameter value
double word
Parameter Access
VLT
®
PROFIBUS DP MCA 101
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Danfoss VLT PROFIBUS DP MCA 101 Specifications

General

Brand	Danfoss
Model	VLT PROFIBUS DP MCA 101
Category	Media Converter
Language	English