Problems Concerning The Analog Input - Panasonic FP2 -C1A Manual

FP2 Analog Unit

13.1 Problems Concerning the Analog Input

Problem
Analog input conversion value cannot
be read.
Proper current input conversion value
cannot be obtained.
Conversion value is unsteady.
Proper conversion value cannot be
obtained during R.T.D. Pt100
connection.
Proper conversion value cannot be
obtained during thermocouple
connection.
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13.1 Problems Concerning the Analog Input
Remedy
Check the I/O allocation for the analog units.
Check the range settings.
Check the settings for no execution of conversion processing (shared
memory setting).
Check the analog signal wiring.
Check the terminal block wiring.
Check the current input devices.
Make sure that you are using shielded twisted - pair wiring for the input
signal wires.
Make sure that the shielding of the shielded twisted - pair wiring is proper-
ly connected.
Make sure that no input signal wires are near other power wires.
Check the range settings.
Check the three- wire wiring and restart the equipment.
Check the range settings.
Check the polarity of the thermocouple.
Troubleshooting
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