VEGA VEGAFLEX 82 Modbus and Levelmaster protocol - Manual (Page 74)

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11 Supplement
VEGAFLEX 82 • Modbus and Levelmaster protocol
41833-EN-130314
Display and adjustment module
Display element
Display with backlight
Measured value indication
Ʋ Number of digits 5
Ʋ Size of digits W x H = 7 x 13 mm
Adjustment elements 4 keys
Protection rating
Ʋ unassembled IP 20
Ʋ mounted into the housing without
cover
IP 40
Materials
Ʋ Housing ABS
Ʋ Inspection window Polyester foil
Integrated clock
Date format
Day.Month.Year
Time format 12 h/24 h
Time zone Ex factory CET
Measurement electronics temerature
Resolution
1 °C (1.8 °F)
Accuracy ±1 °C (1.8 °F)
Voltage supply
Operating voltage
8 … 30 V DC
Interpolation protection Integrated
Electrical protective measures
Protection rating
IP 66/IP 67
Overvoltage category III
Protection class I
Approvals
Instruments with approvals can have different technical data depending on the version.
For that reason the associated approval documents of these instruments must be carefully noted.
They are part of the delivery or can be downloaded under www.vega.com and "VEGA Tools" as
well as under "Downloads" and "Approvals".
11.2 Basics Modbus
Bus description
The Modbus protocol is a communication protocol for the communication between instruments. It is
based on a Master/Slave or Client/Server architecture. By means of Modbus, a Master and several
Slaves can be connected. Each bus participant has an unambiguous address and can send mes-
sages to the bus. This is initiated by the Master, the addessed Slave answers. The versions Ethernet
and serial (EIA-232 and EIA-485) as well as the modes ASCII, TCP and RTU are available for the