VEGA VEGAFLEX 86 Modbus and Levelmaster protocol Coax probe - Manual (Page 22)

22
5 Connecting to power supply and bus system
VEGAFLEX 86 • Modbus and Levelmaster protocol
42288-EN-130314
+
+
power supply
MODBUS
D0 D1 IS GND
USB
1
2
1 3 4 5 2 off on ( )
(
)
(-)
(-)
Fig. 14: Connection compartment
1 USB connection
2 Slide switch for integrated termination resistor (120 Ω)
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 VEGAFLEX 86 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 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.
Connection compartment