Burkert Type 8605 - Manual (Page 16)

16
Serial Communication
command number
command name 0x01
readprimaryVariable
request
Command
0x01
Byte count 0
data -
response
Command
0x01
Byte count 7
Status 2 bytes, device status
data 5 bytes
0
PV units code
1 ... 4 primary variable (float) 3)
Description
HART-Universal Command 1.
PV Unit 0 x 39
hex
%
PV Coil current scaled as a %, where I
LO
= 0 % and I
HI
= 100 %
(see also " 3.6.3. Codings and units")
Command 0x01 - ReadPrimaryVariable Table 7:
Example:
All data as hexadecimal numbers (prefix 0x) short frame
Primary master
Short address 0
data sent
data received
Read Primary Variable •
0xFF 0xFF 0x02 0x80 0x01 0x00 0x83
0xFF 0xFF 0x06 0x80 0x01 0x07 0x00 0x00 0x39 0x41 0xC8 0x00 0x00 0x30
0x39 for PV Unit = %
0x41C80000 = 25.0 IEEE 754 floating point
First byte transferred: MSB
3)
english
Typ 8605