FX15 Controller Technical Bulletin
44
Troubleshooting
Reading 9999 or Invalid from the Analog Inputs
• Error/Condition: The Analog Input object retrieves an Invalid
value through network variables or the User Interface Unit shows
9999 or Invalid customized tag;
• Problem: Happens in the case the signal applied to the Analog
Input channel does not match with the one configured via software
on the Analog Input Object. The read signal is outside the
configured reliability range. The problem can be due to the Jumper
configuration of the Analog Input channel which can not be set
according to the signal provided by the sensor;
• Solution: In case the signal does not match with the configured,
change the Analog Input Object configuration via FX Builder. If the
software is properly configured but the problem still happens, check
the analog inputs jumpers are properly set in order to accept the
sensor signal and verify the probe functioning and wirings.
Can Not Properly Read Current Sensors
• Error/Condition: Connecting an active, current sensor to an
Analog Input channel, the AI Object retrieves an Invalid value;
• Problem: In the case the AI Object is properly configured and the
probe is correctly wired and functioning, the problems may be due
to a wrong AI Jumper configuration;
• Solution: A dedicated Jumper is placed on board for each Analog
Input Channel. This Jumper is used in its close configuration in the
case the connected sensor provides a Current signal (0-20/4-20 mA).
Its open configuration has to be used for Resistive, Ratio-Metric or
Voltage (0-2/0-10 V) input signals.
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