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SLAVE PROTOCOL
LIST OF THE AVAILABLE COMMANDS:
1. Net weight query.
2. Auto-tare command.
3. Tare clear command.
4. Semi-automated zero command.
5. Weight set point setting.
6. Set set point query.
7. Command for set point saving in permanent memory.
8. Logical output enabling.
9. Logical inputs status query.
10. Weighing execution command.
The device connected with the unit (typically a personal computer) performs MASTER functions and is
the only device capable to start a communication procedure.
The communication procedure should always include the transmission of a string by the MASTER, fol-
lowed by a response from the concerned SLAVE.
COMMAND FORMAT DESCRIPTION:
The double quote marks (inverted commas) enclose constant characters (observe upper and lower
cases); the symbols < and > enclose variable numeric fields. The Field <Addr> represents the unit ID.
In case of communication on the RS485 port, it is obtained by summing up 80h and the address value
of the unit (example: with address 3, <Addr> = 80h + 03h = 83h).
1. NET WEIGHT QUERY
Master: <Addr> "N" EOT
MC 315: <Addr> "N" <status> <net> ETX <chksum> EOT or <Addr> NAK EOT
2. AUTO-TARE COMMAND
Master: <Addr> "A" EOT
MC 315: <Addr> "A" ACK EOT or <Addr> NAK EOT
3. TARE-CLEAR COMMAND
MASTER: <Addr> "DT" EOT
MC 315: <Addr> "D" ACK EOT or <Addr> NAK EOT
4. SEMI-AUTOMATED ZERO COMMAND
Master: <Addr> "Z" EOT
MC 315: <Addr> "Z" ACK EOT or <Addr> NAK EOT
5. WEIGHT Set point SETTING
Master: <Addr> "S" <index> <set point> ETX <csum> EOT
MC 315: <Addr> "S" ACK EOT or <Addr> NAK EOT
The value set points should be lower than the full-scale parameter.
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