dacell DN500N - 7-3. RS-422 Series Communication (Option 04)

DIGITAL INDICATOR
DN500N
28
7-3. RS-422 Series Communication (Option 04)
RS-422 is to transmit signal by voltage difference. Therefore, it is more stable than other
communication methods against electric noise.
Please do wiring separately from AC Power Cable and other electric wires. Also you must use
exclusive Shield Cable(over 0.5Φ) for communication.
Recommended distance for use is within 1.2Km.
▶ SIGNAL FORMAT
① TYPE : RS-422
② FORMAT: ⓐ Baud-Rate: 300∼115200 can be selected.
ⓑ Data Bit: 7 or 8 (No Parity)
ⓒ Stop: 1
ⓓ Parity Bit: Even, Odd, No Parity can be selected.
ⓔ Code: ASCII
Start 1 bit Data bit Parity bit Stop 1 bit
▶ One-Way Transmit MODE
1. Header1
- Stable
- Unstable
- Over Load
2. Header2
- Net Weight
- Net Hold Weight
- Gross Weight
- Gross Hold Weight
3. UNIT
- kg
- t
4. DATA
- Weight including sign and decimal point
-
5. BCC = Σｉ %(MOD) 127(7FH) ^(XOR) 136(88H)
1
0
1.5V
Potential
difference
LSB
0
1 2 3 4 5
MSB
6
STX (1) ID.NO. (2) COMMAND (4) DATA (14) BCC (1) ETX (1)
Header1 (2) Header2 (2) DATA (8) UNIT (2)