Panasonic KT4R User Manual page 111

Problem
The PV Display
keeps indicating
the value set in
[Scaling low limit].
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Possible Cause
Check whether the input
signal wire for DC voltage (0
to 5 V DC, 0 to 10 V DC) and
Direct current (0 to 20 mA
DC) is disconnected.
Check whether the input
terminals for DC voltage (0 to
5 V DC, 0 to 10 V DC) or
Direct current (0 to 20 mA DC)
are securely connected to the
instrument input terminals.
Solution
Check the input signal wires of DC voltage (0 to 5
V DC, 0 to 10 V DC) and Direct current (0 to 20
mA DC).
How to check whether the input signal wire is
disconnected
[DC voltage (0 to 5 V DC, 0 to 10 V DC)]
If the input to the input terminal of this controller is
1 V DC, and if a value (converted value from
scaling high, low limit setting) corresponding to
1 V DC is indicated, the controller is likely to be
operating normally, however, the input signal wire
may be disconnected.
[Direct current (0 to 20 mA DC)]
If the input to the input terminal of this controller is
4 mA DC, and if a value (converted value from
scaling high, low limit setting) corresponding to 4
mA DC is indicated, the controller is likely to be
operating normally, however, the input signal wire
may be disconnected.
Connect the input terminals of DC voltage and
current to the input terminals of this instrument
securely.