Vega VEGAPULS C 21 User Manual

49
14 Supplement
VEGAPULS C 21 • Modbus and Levelmaster protocol
58343-EN-200806
Overvoltage protection
Dielectric strength against metallic
mounting parts
> 10 kV
Overvoltage resistance (test impulse
voltages1.2/50µsat42Ω)
> 1000 V
Additional overvoltage arrester Duetotheoatingstructureoftheelectronicsandcom-
prehensive insulation measures generally not necessary.
Electrical protective measures
Potential separation
Electronics potential free up to 500 V AC
Protection rating IP66/IP68 (3 bar, 24 h) acc. to IEC 60529,
Type 6P acc. to UL 50
Altitude above sea level 5000 m (16404 ft)
Protection class III
Pollution degree 4
14.2 Modbus – Overview
Modbusisabussystemforconnectingahost(e.g.PLC)andseveralslaves(e.g.elddevices).
DatatransmissionviatheModbuscommunicationprotocoltakesplaceindierentoperating
modes:
•
Modbus ASCII (data transmission as ASCII signs)
•
Modbus RTU (data transmission is binary signs)
A version of the Modbus protocol is the Levelmaster protocol.
Thedataexchangebetweenelddeviceandhostisdoneviaregisters.Theinputregistersonlyal-
low read access, holding registers both read and write access.
Thedevicesupportstheabovementionedpoints.Thefollowingshowsthedevice-specicdetails
required for this.
YoucanndfurtherinformationtoModbusonwww.modbus.org.
14.3 Communication
Register Num-
ber
Register Name Data type CongurableValues Unit Default
Value
200 Address uint8
r/w
1 … 255 – 246
201 Baud Rate enum16
r/w
1200, 2400, 4800, 9600,
19200, 38400, 57600
– 9600
202 Parity enum8
r/w
0 = None, 1 = Odd, 2 =
Even
– 0
203 Stopbits enum8
r/w
1 = None, 2 = Two – 1
206 Delay Time uint16
r/w
10 … 250 ms 50

Vega VEGAPULS C 21 Specifications

General

Brand	Vega
Model	VEGAPULS C 21
Category	Accessories
Language	English