TOS5051A/5050A
7-3
Chap
.7
RS-232C Interf
ace
7.3
Communication Method
Communication is performed using commands from the PC and responses from the
tester.
One response is always returned for one command.
Commands cannot be sent continuously. Con
fi
rm the response before sending the
next command.
7.4
Talk Mode
The RS-232C on the tester has four talk modes.
Table 7-2
Talk modes
1
.
The lower cutoff current is returned when the lower pass/fail judgment is enabled (“LOWER ON” is lit).
2
.
The preset test time is returned when the timer function is enabled (“TIMER ON” is lit).
Processing on the PC is reduced in talk modes 1 to 3, since commands do not need
to be sent from the PC. In addition, by connecting a serial printer to the tester, these
modes allow the test log to be printed directly.
Talk mode
Description
0
Mode in which the tester responds only to commands from the PC (default setting).
1
Mode in which the tester automatically responds when a test is started and when a test is com-
pleted. Returns only the tester status.
Response when a test is started
<START>
Response when a test is completed <PROTECT>, <PASS>, <U_FAIL>, <L_FAIL>, or <STOP>
2
Mode in which the tester automatically responds when a test is started and when a test is com-
pleted. Returns the tester status, settings, and measured values.
Response when a test is started
Upper cutoff current, (lower cutoff current
1
,)
(preset test time
2
,)
<START>, AC or DC
Response when a test is completed
Maximum measured voltage, maximum measured current,
actual test time, and the response when the test is completed
in talk mode 1
3
The operation is the same as talk mode 2, except an LF code is added when the test is completed.
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