Siemens SINAMICS G120 - Page 443

Appendix
A.7 Application examples
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
443
Figure A-12 Writing parameters
Explanation of FC 3
Table A- 13 Request to change parameters
Data block DB 3
Byte n
Bytes n + 1
n
Header
Reference MB 42
02 hex: Change request
0
01 hex
Number of parameters MB 44
2
Address,
parameter 1
10 hex
: Parameter value
Number of indexes
00 hex 4
Parameter number MW 21
6
Number of the 1st index MW 23
8
Values,
parameter 1
Format MB 25
Number of index values MB 27
10
Value of the 1st index MW35
12
SFC 58 copies the specifications for the parameters to be written from DB 3 and sends them
to the inverter. The inverter blocks other write jobs while this write job is running.