DPOS 400
49-TGDP4ES02
35
4.27 DATECS Protocol
Protocol
Cash Register
Scale
N
L
N
L
N
L
N
L
N
L
S
x
N
L
N
L
N
L
N
L
N
L
N
L
N
L
N
L
GGGKKKPPPPPIIIIII / NAK
Where:
N
L
:
0x00h
S
X
:
0x02h
GGG:
3 characters for grams.
KKK:
3 characters for kilo.
PPPPP:
5 characters for price.
IIIIII:
6 characters for amount.
NOTE:
-
The scale always sends to zero (0x30) the field price and amount.
-
The scale responds with
NAK
(and restart the communication) when there is an incorrect character
on a frame.
-
The scale sends the data of the frame
GGGKKK
from right to left (LSB
MSB). For example, the
weight 5,492 Kg is sent as 294500.
-
The scale sends the weight frame to zero if the weight is negative or overflows.
-
If the weight is unstable the scale sends the momentary weight.
-
If the scale has a tare weight, it sends the net weight.
-
The scale takes into account the minimum weight adjustment. If this adjustment has the value 1, the
scale will not respond if the weight is lower than 20 steps.
-
Between different requests the weight must vary at least 20 steps or pass through zero, otherwise the
scale will not respond.
Содержание DPOS400 SERIE
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