Vega VEGAPULS C 21 - Page 57

57
14 Supplement
VEGAPULS C 21 • Modbus and Levelmaster protocol
58343-EN-200806
Assign Unit Number
Parameter Length Code/Data
Request: Assign Unit Number 6 characters ASCII UuuNnn
Response: Assign Unit Number 6 characters ASCII UuuNOK
uu = new Address
Set number of Floats
Parameter Length Code/Data
Request: Set number of Floats 5 characters ASCII UuuFn
Response: Set number of Floats 6 characters ASCII UuuFOK
If the number is set to 0, no level is returned
Set Baud Rate
Parameter Length Code/Data
Request: Set Baud Rate 8 (12) characters ASCII UuuBbbbb[b][pds]
Bbbbb[b] = 1200, 9600 (default)
pds = parity, data length, stop bit (optional)
parity: none = 81, even = 71 (default),
odd = 71
Response: Set Baud Rate 11 characters ASCII
Example: U01B9600E71
Change instrument on address 1 to baudrate 9600, parity even, 7 data bits, 1 stop bit
Set Receive to Transmit Delay
Parameter Length Code/Data
Request: Set Receive to Transmit
Delay
7 characters ASCII UuuRmmm
mmm = milliseconds (50 up to 250),
default = 127 ms
Response: Set Receive to Transmit
Delay
6 characters ASCII UuuROK
Report Number of Floats
Parameter Length Code/Data
Request: Set Receive to Transmit
Delay
4 characters ASCII UuuF
Response: Set Receive to Transmit
Delay
5 characters ASCII UuuFn
n = number of measurement values
(0, 1 or 2)