Toshiba LF494 - Manual (Page 132)

TOSHIBA
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12> Self-Diagnostics and Alarms
Sc]f“diagnostjc itt;ins iind their error or alarm messages are described below.
L2.1 Self*diagnostics
The Ll’404 converter has a self-diagnostics function to detect such problems as setting error,
I/O error or converter hardware failure and shows the rcsulling error or alarm messages on
the LCD display (optional) or on the AKIOO hand-held terminal through the HAKT protocol
communications. The error or alarm messages and their corrective actions are described
below.
■ Selting error
If you try to set the value or measuring unit out of the range specified for each item» one of
the following error messages appears.
Error message
Description Corrective action
* H. OVER SPEC.
Setting value exceeds the
allowable high limit.
Try to set the value
within the specified
range.
* L. OVER SPEC.
Seuing value goes below the
allowable low limit.
4 H OVER C RATE
Counting rate exceeds the
allowable high liniil.
* L, OVER C RATE
Counting rate goes below the
allowable low limit.
* MULTI RNG ERR
Span is not appropriate for
multi-range confifìuraiion, Try lo set the span as
specified.
High aod low limit alarms
If the flow rale reading goes out of the set range, one of the following messages
appears* If the high or lov-' limit alarm enabte/disable .stains is set lo OIT» its
alarm funciton (high or low) is disabled. Sec 8.2.15, "High and l*ow iJmit
Alarms.”
Alarm message Description Corrective action
IL ALARM
l^'low rate reading exceeds
the high limit.
Arrange so that the
reading slays below
the hii^h limit.
L. AL.TO
Flow rale reading goes below
the low limit.
Arrange so that the
reading stays above
the low' limit.
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