Communication - Hioki 3154 Instruction Manual

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7.1.2 Communication

Command is sent out from personal computer to 3154.
After receiving command, 3154 processes operation
according to the command.
When personal computer sends inquiry command
(command with "?"), 3154 sends back corresponding
response.
During communication, 3154 front panel REMOTE lamp is
turned on in remote status.
Remote status disables all operations except STOP key,
LOCK key and 9299 SWITCHED PROBE switch
operations.
Press LOCK key to disengage remote status
(communication) and returns to local status.
REMOTE lamp
Output Queue
Response messages accumulated in the output queue and
are transmitted as data and cleared. The output queue is
also cleared when the power is turned off and turned on
again. The 3154 has an output queue of 256 bytes capacity.
If the response messages overflow this limit of 256 bytes, a
query error is generated, and the output queue queue is
cleared.
Input Buffer
The 3154 has an input buffer of 256 bytes capacity. When
more than 256 bytes of data are transmitted, when the
buffer is full any subsequent bytes received will be ignored.
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RS-232C Interface