Data I/O UniSite-xpi, User Manual

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4. Commands
UniSite-xpi User Manual 4-37
Since the host may not explicitly report any error, to determine if errors
are occurring during an upload process, transfer data to the host by using
the upload function with an I/O format that utilizes checksums (such as
Format 87) selected. Note the checksum reported by UniSite-xpi when the
transfer is complete. Then transfer the same data back to UniSite-xpi
while UniSite-xpi is performing the compare data function, again noting
the checksums. If the checksums don’t match or if an error is
encountered, a transmit pacing delay should be used.
Typical delay values are presented in the following table. The transmit
pacing value is specified in tenths of milliseconds delay. For example, a
value of 12 represents 1.2 milliseconds delay. The minimum delay
possible (other than zero) is 4 (0.4 milliseconds) and the maximum is 99
(9.9 milliseconds). The factory default is 0. The transmit pacing value
required for reliable data transfers may vary somewhat from those
presented in the table due to the particular characteristics of the host
involved. This is primarily determined by the processor speed of the host
and whether or not software other than the communication software is
running at the same time on the host (in the latter case, larger delay
values may be required).
Transmit Pacing Delay
Values
4800 and less 9600 19.2K
HiTerm
PC 0 0 6
AT 0 0 6
VTERM
PC 0 4 15
AT 0 0 8
PROCOMM
PC 0 4 9
AT 0 0 6