Parity Checking; Timing - Omega DPF700 User Manual

8
RS-232 O
PTION

8.7 PARITY CHECKING

Although the meter includes an even parity bit with data sent out on the
RS-232C interface, it does not check the data received for even parity.

8.8 TIMING

When you send a 'PUT' command to the meter, the command is accompanied by a string of 42
setup characters. The BASIC program statement PRINT #1, @U?P + SETUP$ puts the string
into an output buffer for transmission and the BASIC program continues while the data is being
transmitted. If, within a few lines, you execute the statement PRINT #1, @U?G, the @U?G is
added to the end of the setup string in the buffer (which is still being transmitted). This causes the
@U?G characters to be missed because each transmission from the computer must be
completely received by the meter and the next measurement started before another command is
issued. A statement FOR J=1 TO 300:NEXT J introduces enough delay to allow
separation between commands.
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