VEGA VEGACOM 557 Siemens 3964 and 3964 R procedure with RK 512 User 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