Denso BHT-7500 - Manual (Page 175)

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Chapter 4. Error Messages
UPLOAD FILE
XXXXXXXX.XXX
Communication error!!
Retry?
1:Yes 2:No
■ Problem
Uploading has failed.
■ Solution
To retry uploading, press the 1 key.
To return to the SYSTEM MENU, press the 2 key.
Check the interface port, communications param-
eters, and communications protocol type in the
SET SYSTEM menu or perform the communica-
tions test in the TEST menu. (Refer to Chapter 2,
Subsection 2.5.3, [4.5] and [5.5].)
It is also necessary to check the communications
parameters setup of the host computer.