CALIBRATION PROCEDURES
50
When sending command over the RS232 bus the 7611 will echo a response string
identical to the string that was sent if the transfer was recognized and accepted by
the instrument. This allows for software handshaking, to monitor and control data
flow. If there is an error with the command string that is sent, the instrument will
respond with 15h or the “NAK” ASCII control code. When requesting data from the
instrument, it automatically sends the data to the controller input buffer. The
controller input buffer will accumulate data being sent from the instrument including
the echo response string, until it is read by the controller.
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