23
5 Connecting to power supply
VEGAFLEX 81 • Profibus PA
44214-EN-171002
5
0
0
5
1
6
2
7
3
8
4
9
0
5
1
6
2
7
3
8
4
9
1
0
1
6 7 8
Bus
2
1
3
1 2
+
( )
(-)
Fig. 15: Address selection switch
1 Addresses <100 (selection 0), addresses >100 (selection 1)
2 Decade of the address (selection 0 to 9)
3 Unit position of the address (selection 0 to 9)
Software addressing is only effective if address 126 or higher is set
on the instrument with the address selection switches.
The addressing procedure is described in the operating instructions
manual "
Display and adjustment module
.
5.8 Switch-on phase
After VEGAFLEX 81 is connected to the bus system, the instrument
carries out a self-test for approx. 30 seconds. The following steps are
carried out:
•
Internal check of the electronics
•
Indication of a status message, e.g. "
F 105 Determine measured
value
" on the display or PC
•
Status byte goes briefly to fault value
Then the actual measured value is outputted to the signal cable. The
value takes into account settings that have already been carried out,
e.g. default setting.
Software addressing