6f8a0774, 9 converter failure alarm, I output conditions – Toshiba LF494 User Manual
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10.9
Converter Failure Alarm
When one or more of the foil owing con verier errors occur in
' d
scJf-diagnostics sequence» an
alarm signal can be output. To use Ibis function, sci DOl or D02 to use as an alarm output
sigtial. See Chapter 12, “Self-Diagnosiics anti Warning h’unctions’^ for details of each alarm
status.
Self-diagriostics errors
Self-diagnostics error
(LCD display)
Error contents
•ROM ERROR*
ROM error
•RAM ERROR*
RAM error
PARAMETER FAIL
System parameter error
EX. CURR. OPEN
Excitation circuit open
EX. CURR ERROR
Excitation current error
ADC ERROR
ADC error
INVALID TOTAL
Invalid totalizer counts
I Output conditions
Active status of Alarm output caa be selected as follows,
■ Normal Open; transistor / relay contact is closed when an error occurs,
• Normal Close; transistor/reliy contact is open when an error occurs.
Note: Alarm output contacts arc open while the converter is powered off.
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