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IWQ Series Service Manual
3.2.3 Input command format
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Input commands (received data)
Execution commands for functions
1) Tare weight deduction command (T Command)
2) Zero adjustment command (Z Command)
3) Preset call-up demand (P Command)
Commands for data demand
1) Scale data demand 1 (O8 Command, are time output upon receipt)
2) Scale data demand 2 (O9 Command, are time output upon receipt when transmission conditions
meet.)
* The input command is determined to be valid only when the output mode is set to “data demand to
be input”, and is undetermined for other cases.
•
Transmission procedures
1) Conditions for command receipt
A command can be received all the while the scale is ON, for the transmission mode is fully duplex,
except that double command receipts are prohibited (until the first command is responded to fully,
the second command will not be received).
Except for Normal Mode (Setup Mode, Registration Mode, Tare Weight Setup Mode, etc.), a
command is only received and executed/responded after returning to Normal Mode.
2) Response
When a function execution command is received, an affirmative response (ACK) is output after
normally execution. Alternatively, or a data output command is received, and a preset message is
output when output conditions meet.
When an invalid command or an invalid text is received, a negative response (NAK) is given when
verifying outside the range for command execution, or when an input text is insufficient, the
machine waits.
For an insufficient text receipt, the receipt buffer will be reset if LF (OAH) is received.
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Input command text
1
2
3
4
C1
C2
CR
LF
(0DH)
(0AH)
Command
Terminator
•
Response command text
Affirmative response
ACK
(06H)
Negative response
NAK
(15H)
