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Handling Errors and Alarms Section 2-8
Value Does Not Change as Intended
Conversion Values are Inconsistent
Probable cause Countermeasure Page
The input device’s signal range
does not match the input signal
range for the relevant input number
at the Analog Input Unit.
Check the specifications of the
input device, and match the settings
for the input signal ranges.
14
The offset and gain are not
adjusted.
Adjust the offset and gain. 60
When using the 4 mA to 20 mA
range, the voltage/current switch is
not turned ON.
Turn ON the voltage/current switch. 31
Probable cause Countermeasure Page
The input signals are being affected
by external noise.
Change the shielded cable connec-
tion to the Unit’s COM terminal.
36
Insert a 0.01-µF to 0.1-µF ceramic
capacitor or film capacitor between
the input’s (+) and (–) terminals.
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Try increasing the number of mean
value processing buffers.
55
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