Word number
N (Data Param. 2)
Format
# elements
N+1 (Data Param. 2)
Data
Data
N (Data Param. 3)
Format
# elements
N+1 (Data Param. 3)
Data
Data
N+1 (Data Param. 3)
Data
Data
N+1 (Data Param. 3)
Data
Data
Table 7.1 Request Telegram
7.6 Header
Request number
Request # is used by the Master to handle the response
from the IO device. The IO device mirrors this number in
its response.
Request ID
1=request parameter 2=change parameter
Axis
Always leave this to 0 (zero). Only used in multi axis
system.
Number of parameters
Number of parameters to read or write.
7.7 Parameter Block
The following 5 values have to be provided for each
parameter to read.
Attribute
Attribute to be read
10=Value
20=Description
30=Text
Number of elements
The number of elements to read, if parameter is indexed.
Attribute
Attribute to be read.
Parameter number
The number of the parameter to read.
Subindex
Pointer to the index.
7.8 Data Block
The Data block is only needed for write commands. For
each parameter to write this information has to be set-up.
Format
The format of the information to write,
2: Integer 8
3: Integer 16
4: Integer 32
5: Unsigned 8
6: Unsigned 16
7: Unsigned 32
9: Visible string
33: Normalised value 2 bytes
35: Bit sequence of 16 Boolean variables
54: Time difference without date
For the individual frequency converter series, the
programming guide contains a table with parameter
number, format, and other relevant information and will
not be further explained in this manual.
Number of elements
The number of elements to read if parameter is indexed.
Data
The actual value to transfer. The amount of data has to be
exactly the size requested in the parameter block. If the
size differs, the request generates an error.
On a successful transmission of a request command, the
master can read the response from the frequency
converter. The response does look very much like the
request command. The response only consists of 2 blocks,
the header and the data block.
1 Header
Request #
Request ID
2 Header
Axis
# Param.
3 (Data Param. 1)
Format
Error code
4 (Data Param. 1)
Data
Data
5 (Data Param. 2)
Format
Error code
6 (Data Param. 2)
Data
Data
7 (Data Param. 3)
Format
Error code
8 (Data Param. 3)
Data
Data
9 (Data Param. 3)
Data
Data
10 (Data Param. 3) Data
Data
Table 7.2 Response Telegram
7.9 Header
Request number
Request # is used by the Master to handle the response
from the IO device. The IO device does mirror this number
in its response.
Request ID
1=request parameter
2=change parameter
Axis
Always leave this to 0 (zero).
Only used in multi axis system.
Number of parameters
Number of parameters transferred.
7.10 Data Block
The Datablock is only needed for write commands. For
each parameter to write, this information has to be set-up.
Format
See
Table 7.2
.
PROFINET Acyclic Communicat...
Operating Instructions
40
Danfoss A/S © Rev. 2014-02-27 All rights reserved.
MG90U302
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Summary of Contents for VLT PROFINET MCA 120
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