2 structure of the response message, Structure of the response message, Profibus communication – Lenze 931K User Manual
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PROFIBUS communication
The data telegram
Structure of the response message
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16
KHB 13.0004−EN 2.1
5.1.2
Structure of the response message
ADR = 1
ADR = 2
ADR = 4
ADR = 8
ADR = 12
ADR = 16
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
...
...
Data 3rd PNU
Data 2nd PNU
Data 1st PNU
Status word 1 (PNU 968)
Mandatory wildcard (PNU 2010.0)
Telegram identifier (not changeable). In the telegram editor the corresponding response message has to
be assigned to the receive message:
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Response message 0: "positioning" mode (value of byte 0: F0
h
)
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Response message 1: "speed control" mode (value of byte 0: F1
h
)
5.1.3
Structure of the receive and response message with PKW mechanism
The PKW mechanism (PKW = parameter identifier value) enables a variable read/write
access to the parameters of the controller with a defined telegram structure.
ƒ
Use the PNU 2000 for the PKW mechanism.
Receive message
The PNU 2000 can be entered in the telegram editor, for instance under address 4.
ADR = 1
ADR = 2
ADR = 4
ADR = 12
ADR = 16
1st DWORD
2nd DWORD
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
...
...
Data 2nd PNU
PNU 2000
Control word 1 (PNU 967) (
^ 54)
Mandatory wildcard (PNU 2010.0)
Telegram identifier
ƒ
Structure of PNU 2000:
(two data double words (2 × 4 bytes))
Byte 0 Byte 1 Byte 2 Byte 3
Byte 4 7
Parameter value
Subindex of PNU
PNU to be accessed by the master
Identifier:
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Read access: 41
h
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Write access: 42
h
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No access: 00
h