FX15 Controller Technical Bulletin
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 an Invalid customized tag.
• Problem: Happens when 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 cannot be set
according to the signal provided by the sensor.
• Solution: In case the signal does not match the configuration,
change the Analog Input Object configuration via FX Builder. If the
software is properly configured but the problem still occurs, ensure
the analog inputs jumpers are properly set to accept the sensor signal
and verify the probe functioning and wirings.
Cannot Properly Read Current Sensors
• Error/Condition: Connecting an active, current sensor to an
Analog Input channel, and the AI Object retrieves an Invalid value.
• Problem: When 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 a closed configuration when
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.
To Next Page
Loading...