SEW-Eurodrive MOVI-PLC basic DHP11B-T0, Руководство пользователя

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5
PROFIBUS-DP Operating Characteristics
Parameter setting via PROFIBUS-DP
50
Manual – MOVI-PLC
®
basic DHP11B.. controller
5.3 Parameter setting via PROFIBUS-DP
In the PROFIBUS-DP system, the parameters are accessed via the 8 byte MOVILINK
®
parameter channel. This parameter channel offers extra parameter services in addition
to the conventional
read and write services.
Structure of
the 8 byte
MOVILINK
®
parameter
channel
PROFIBUS-DP enables access to the MOVI-PLC
®
basic DHP11B.. parameters via the
"parameter process data object" (PPO). This PPO is transmitted cyclically and in addi-
tion to the process data channel [2], contains a parameter channel [1], which can be
used to exchange acyclical parameter values.
The following table shows the structure of the 8 byte MOVILINK
®
parameter channel. Its
basic structure is as follows:
• One management byte
• One reserved byte
• Two index bytes
• Four data bytes
58377AXX
Fig. 12: Communication via PROFIBUS-DP
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
Manage-
ment
Reserved
Index high Index low MSB data Data Data LSB data
Parameter index 4 byte data
X31
X32
X33
X30
X34
20
21
22
23
24
25
26
DHP11B
1
2
3
1
2
3
1
2
3
2
3
1
[1] [2]
[2] [1]
0 0
I