Salter Brecknell 7821 User Manual
Page 20
Model 7821 Bench Scale User’s Manual
20
Serial
Communications
Protocol
NCI
Communications
Protocol
DE-9 Female Scale
DE-9 Male Host
Pin
Name
Direction
Pin
Name Direction
1.
JMP 1
-
1.
DCD
IN
2.
TXD
OUT
2.
RXD
IN
3.
RXD
IN
3.
TXD
OUT
4.
JMP 1
-
4.
DTR
OUT
5.
SG
-
5.
GRD
-
6.
JMP 1
-
6.
DSR
IN
7.
JMP 2
-
7.
RTS
OUT
8.
JMP 2
-
8.
CTS
IN
9.
NC
-
9.
RI
IN
For command/response descriptions, please
refer to the following Weigh-Tronix NCI Serial
Communications Documents:
NCI Standard Protocol: 8408-14788-01 (W, S, Z,
H, U, M only)
8213 Protocol: 8408-14788-03
NCI 3835 Protocol: 8408-14788-12
This standard is used by all NCI bench scale
products.
SYMBOL KEY:
<ETX>
End of text character (03/hex)
<LF>
Line feed character (0A hex)
<CR>
Carriage return character (0D hex)
<SP>
Space (20 hex)
x
Character from display including
minus sign
hh…
Two or more status bytes
uu
Unit of measure (lb, kg, oz, g, etc.
using ANSI standard abbreviations)