VEGA VEGAPULS SR 68 Modbus and Levelmaster protocol - Manual (Page 34)

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5 Connecting to power supply and bus system
VEGAPULS SR 68 • Modbus and Levelmaster protocol
41371-EN-130624
Terminal Function Polarity
1 Voltage supply +
2 Voltage supply -
3 Modbus-Signal D0 +
4 Modbus-Signal D1 -
5 Function ground with installa-
tion according to CSA
5.4 Switch-on phase
After VEGAPULS SR 68 is connected to the bus system, the instru-
ment carries out a self-test for approx. 30 seconds. The following
steps are carried out:
•
Internal check of the electronics
•
Indication of the instrument type, hardware and software version,
measurement loop name on the display or PC
•
Indication of the status message "F 105 Determine measured
value" on the display or PC
•
Status byte goes briefly to fault value
As soon as a plausible measured value is found, it is outputted to the
signal cable. The value corresponds to the actual level as well as the
settings already carried out, e.g. factory settings.