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This communication mode is compatible with the basic work modes Weight-
Tare, Levels and Part Counting:
TPV Scale
ENQ
NAK, if there is an error in the reception.
NULL, if the weight is unstable.
ACK, if the weight is zero or is not zero but has varied
since the last request.
CAN, if the weight has not varied since the last request.
ENQ - Character 0x05, 5d.
NACK - Character 0x15, 21d.
NULL - Character 0x00, 0d.
ACK - Character 0x06, 6d.
CAN - Character 0x18, 24d.
When the scale sends 'ACK' to the TPV:
TPV Scale
DC1
NAK, if there is an error in the reception.
<STX><ID><PPPPP><BCC><ETX>, if the weight is
in range.
<STX><ID><00000><BCC><ETX>, if the weight is
not in range.
DC1 - Character 0x11, 17d.
NACK - Character 0x15, 21d.
STX - Character 0x02, 2d.
ID (weight in
range)
- Scale type depending on the full-scale value. The
scale always sends (0x69).
ID (weight not in
range)
- Scale type depending on the OR full-scale value
with 0x10. The scale always sends (0x79).
PPPPP - Value of the weight in ASCII without decimal
point and left-justified with zeros (0x30).
00000 - Five zeros in ASCII (0x30).
BCC - XOR of all of the frame's characters except STX
and ETX.
ETX - Character (0x03, 3d).
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