Denso BHT-8000 User Manual page 166

Abnormal termination of phase 1 (Abort of phase 1)
If the sending station receives no ACK from the receiving station after sending an ENQ 10 times in
succession, then it sends an EOT to the receiving station after three seconds from the 10th ENQ to
terminate the message transmission abnormally.
The receiving station's default timeout is 30 seconds. You may modify the timeout length on the SET
PROTOCOL screen in System Mode (pp. 58 and 60) or by using the XFILE statement (refer to the
"BHT-BASIC Programmer's Manual").
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