71
10 Supplement
VEGAFLEX 81 • Modbus and Levelmaster protocol
42283-EN-140430
2
4
5
3
1
2
4
5
3
1
Fig.35:Measuringranges-VEGAFLEX81
1 Reference plane
2 Probe length L
3 Measuring range (default setting refers to the measuring range in water)
4 Upper dead band (see diagrams under Accuracy - grey section)
5 Lower dead band (see diagrams under Accuracy - grey section)
Output variable
Output
Ʋ Physical layer Digital output signal according to standard EIA-485
Ʋ Busspecications Modbus Application Protocol V1.1b, Modbus over serial
line V1.02
Ʋ Data protocols Modbus RTU, Modbus ASCII, Levelmaster
Max. transmission rate 19.2 Kbit/s
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure +860 … +1060 mbar/+86 … +106 kPa
(+12.5 … +15.4 psig)
Installation reference conditions
Ʋ Min. distance to installations > 500 mm (19.69 in)
Ʋ Vessel metallic, ø 1 m (3.281 ft), centric installation, process
ttingushwiththevesselceiling