Communication Protocol; Communication Data Frame; Ascii Mode - Danfoss 176F7300 Manual

• (8, O, 1: Pr.92 = 5)
Start 0 1
bit
11-bit character frame

3 Communication Protocol

3.1 Communication Data Frame:

ADR ADR CMD
STX
1 0 1
02H Address CMD

3.2 ASCII mode:

STX Start character: (02H)
ADR 1
Communication address:
ADR 0
8-bit address consists of 2 ASCII codes
CMD 1
CMD 0
DATA 0
DATA 1
Contents of data:
n x 8-bit data consist of 2n ASCII codes
DATA (n-1)
n 25 maximum of 50 ASCII codes
......
N
End characters:
EXT
ASCII = 03 Hex
LRC CHK 1
LRC check sum:
8-bit check sum consists of 2 ASCII codes
LRC CHK 0
2 3 4 5 6
8-bit character
......
CMD 0 1 N-1
0
Data Characters
85
VLT ® MICRO
7 Odd Stop
parity bit
N ETX CHK CHK
1 0
03H Check Sum