BSWA 308 - Flow Control; Multi-Machine Operation

BSWA 308/309 BSWA Technology Co., Ltd
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(3) Instruction Error
The sound level meter may not recognize the instruction received due to the computer sends
an undefined instruction, or unexpected error has occurred during transmission. When the
above errors occur, the sound level meter will return a NAK block, which contains the error
code 0001H.
(4) Parameter Error
Parameters include in command block also could be wrong due to the parameters not
separate by a space, over the available range, or an incorrect number of arguments. When
the above error occurs, the sound level meter will return NAK block, which contains the
error-code 0002H.
(5) Unavailable on the Current State
The current state cannot make the appropriate operating when the following happens:
1
Be request to return octave data in level meter mode, or be request to return level
meter data in octave mode.
2
Be request to perform the calibration operation when running the measurement.
3
Be request to change the measurement parameters or system parameters when
running the measurement.
When the above error occurs, the sound level meter will return NAK block, which contains the
error-code 0003H.
5.2.7 Flow Control
The sound level meter uses three-wire serial interface by P/S2-6 pin socket, which doesn’t
contain the hardware flow control pins. Sound level meter doesn’t support software flow
control. Operation along to the requirements of the rated section 5.2.9 Rated Parameters can
guarantee the correctness of the send data and receive data.
5.2.8 Multi-Machine Operation
More than one sound level meter can be connected to the RS-232 bus, to form a
measurement network. Users can change the setting of all sound level meter in same
network through broadcast instruction, or access to data and parameters of an each sound
level meter by ordinary instruction.
Need to pay attention: