8 switch-on phase – VEGA VEGABAR 55 Foundation Fieldbus - climate compensated User Manual
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5 Connecting to power supply
VEGABAR 55 • Foundation Fieldbus - climate compensated
39443-EN-130321
I2C
Display
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1
2
5
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Fig. 21: Wiring plan external electronics
1 Voltage supply
5.8 Switch-on phase
After VEGABAR 55 is connected to voltage supply or after voltage
recurrence, the instrument carries out a self-check for approx. 30
seconds. The following steps are carried out:
•
Internal check of the electronics
•
Indication of the instrument type, the firmware as well as the sen-
sor TAGs (sensor designation)
•
Status byte goes briefly to fault value
Then the current measured value will be displayed and the corre-
sponding digital output signal will be outputted to the cable.
2)
Wiring plan external
electronics
Switch-on phase
2)
The values correspond to the actual measured level as well as to the settings
already carried out, e.g. default setting.