Retry Of Communication; Retry Due To Time-Out; Reception Time-Out; Transmission Time-Out - Hitachi 902 Service Manual

16.4.7 Retry of Communication

Retry is a function for resending the text sent from the analyzer to the host immediately before
occurrence of any communication error.
(1)

Retry Due to Time-Out

(a)

Reception time-out

If response is not received beyond the response wait time limit (NOTE 1) after
sending a text from the analyzer, reception time-out occurs and retry is made.
When the number of retries (NOTE 2) exceeds the maximum number of retries
allowed for time-out (NOTE 3), communication will be suspended.
(b)

Transmission time-out

If a text cannot be sent from the analyzer, transmission time-out occurs and retry is
made after one communication cycle or longer. When the number of retries (NOTE
2) exceeds the maximum number of retires allowed for time-out (NOTE 3),
communication will be suspended.
NOTES: 1.
2.
3.
(2) Retry Due to Communication Error
If a communication error (NOTE 4) occurs, retry is made immediately before the end of
current communication cycle. When the number of retries (NOTE 5) exceeds the
maximum number of retries allowed before communication error (NOTE 6), the relevant
resent data will be canceled and the next text will be sent.
NOTES: 4.
5.
6.
Time period is changeable by retry time entry on the communication
parameter screen.
The number of retries made consecutively
Retry time is changeable by entry for the number of retries on the
communication parameter screen.
Hardware error or text error
The number of retries made consecutively
Same as in (NOTE 3) of (1) above
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