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6f8a0774, 9 converter failure alarm, I output conditions – Toshiba LF494 User Manual

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TOSHIBA

6 F 8 A 0 7 7 4

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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