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Communication protocol 137
Parameter handling in cyclic communication (DP)
In cyclic PROFIBUS DP communication, parameter data is
transferred in PPO message types 1, 2 and 5, as shown in section
on page
. The parameter identification part consists
of eight bytes, as shown below.
The Request label is used by the master when transmitting data to
the slave, while the Response label is used by the slave as a
positive or negative acknowledgement. The tables below show the
Request/Response functions.
Request labels (from master to slave)
Request
Function
Response labels
Ackn. (+)
Ackn. (-)
0
No task
0
–
1
Request parameter value
1, 2
7
2
Change parameter value (word)
1
7, 8
3
Change parameter value (double
word)
2
7, 8
4
Request description element
3
7
5
Change description element
3
7, 8
6
Request parameter value (array)
4, 5
7, 8
ID
IND
VALUE
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Request label
Response label
Request signal
Parameter number (PNU)
Process data
Parameter
identification
Not used (=0)
CW REF
(PD1, PD2...)
SW ACT
Содержание FPBA-01 PROFIBUS DP
Страница 1: ...Options for ABB drives converters and inverters User s manual FPBA 01 PROFIBUS DP adapter module ...
Страница 4: ......
Страница 10: ...10 Table of contents Document library on the Internet 195 ...
Страница 20: ...20 About the manual ...
Страница 26: ...26 Overview of the PROFIBUS network and the FPBA 01 module ...
Страница 30: ...30 Mechanical installation ...
Страница 91: ...Start up 91 8 Click Properties Network Settings and set baud rate ...
Страница 98: ...98 Start up ...
Страница 118: ...118 Communication profiles ...
Страница 178: ...178 Diagnostics ...
Страница 182: ...182 Technical data ...
Страница 190: ...190 Appendix A PROFIdrive parameters ...