A&D BM series Instruction Manual page 92

Acknowledge Code and Error Codes
16.3.2.
When the " AK, Error code (erCd)" parameter of "Serial interface function (5if)" is set to "on", the
balance outputs <AK> code or error code to each command as follows:
<AK> (06h)
When the balance receives a command to request data and cannot process it, the balance
transmits an error code (EC, Exx).
When the balance receives a command to request data and can process it, the balance outputs
the data.
When the balance receives a command to control the balance and cannot process it, the balance
transmits an error code (EC, Exx).
When the balance receives a command to control the balance and can process it, the balance
transmits the acknowledge code.
<AK> (06h)
Among commands to control the balance, the following transmit the acknowledge code both
when the balance receives the command and when the balance has accomplished the command.
If the command cannot be processed properly, the balance transmits an error code (EC, Exx).
This error can be resolved using the CAL command. xx is error code number.
CAL command
ON command
P command
R command
TR command
TST command
When a communication error has occurred due to external noise, or a parity error has occurred
due to transmission error, the balance transmits an error code (EC, Exx). In this case, send the
command again. xx is error code number.
Settings Related to RS-232C
16.3.3.
Concerning the RS-232C, the balance has two functions: "Data output (
( )". Set each function as necessary.
5if
Acknowledge in ASCII code.
Acknowledge in ASCII code.
(Calibration command using internal mass)
(Display ON command)
(Display ON/OFF command)
(RE-ZERO command)
(Tare command)
(Calibration test command)
90
)" and "Serial interface
dout
BM series