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SERIAL COMMUNICATION PROTOCOLS (continued)
SLAVE PROTOCOL
11. DISPLAY COMMAND FROM GROSS WEIGHT TO NET WEIGHT
MASTER: <Ind> "CN" EOT
INSTRUMENT: <Ind> "C" ACK EOT
12. DISPLAY COMMAND FROM NET WEIGHT TO GROSS WEIGHT
MASTER: <Ind> "CL" EOT
INSTRUMENT: <Ind> "C" ACK EOT
13. TARE CANCELLATION COMMAND
MASTER: <Ind> "DT" EOT
INSTRUMENT: <Ind> "D" ACK EOT
14. NET WEIGHT REQUEST (used for repeater program)
MASTER: <Ind> "W" "N" EOT
INSTRUMENT: <Ind> "W" <rep status> <net> ETX <csum> EOT or <Ind> NAK EOT
15. GROSS WEIGHT REQUEST (used for repeater program)
MASTER: <Ind> "W" "G" EOT
INSTRUMENT: <Ind> "W" <rep status> <gross> ETX <csum> EOT or <Ind> NAK EOT
Where:
<rep status>: character encoded as per the table below (bit = 1 in case of true condition).
Bit 7
0
<net> <gross> = field consisting of 8 ASCII characters with the right-justified net or gross weight value.
(without insignificant zeros, with any decimal point and negative sign).
In overweight conditions, the field takes the value: "^^^^^^^^."
In underweight condition (negative weight greater than 99999) the field takes the value: " ___________ ".
In weight reading error conditions, the field takes the value: " O-L ".
DAT700 Instrument User Manual
or
Bit 6
Bit 5
Bit 4
0
1
1
<Ind> NAK EOT
or
<Ind> NAK EOT
or
<Ind> NAK EOT
Bit 3
Displayed weight
Zero band
0 = net
1 = gross
Bit 2
Bit 1
Stable
weight
Bit 0
Zero
center
pag. 35
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