VEGA VEGACOM 557 Siemens 3964 and 3964 R procedure with RK 512 - Manual (Page 27)

VEGACOM 557 Siemens 27
Saving of VEGALOG data in a PLC data component
2 data words (4 bytes) are required per indicating value. These are saved in the PLC data
component DB as follows:
Image 2 VEGALOG functional component no. = 1 … 254 (source word address 0)
DW
0 HB LB ME STAT VEGALOG functional component no. 1
2 HB LB ME STAT VEGALOG functional component no. 2
4 HB LB ME STAT VEGALOG functional component no. 3
248 HB LB ME STAT
250 HB LB ME STAT
252 HB LB ME STAT VEGALOG functional component no. 127
Note: For indicating values > 64 a second enquiry must be started
(64 • 4 = 256, see block size for Synchron order)
Explanation:
HB LB = Indicating value (Highbyte and Lowbyte)
ME = Field for measuring unit (will be filled with 0)
STAT = Status value
Status values:
STAT Meaning
00 H Valid value
01 H Simulated value
80 H Value not available
FF H General error
S5 functional component