FT-50 Fill Level Inspector Service Manual
8-6
Error Number 23
This error occurs when an extra encoder pulse is detected. This
error can occur when the conveyor stops or starts suddenly.
To correct this error:
• Check LED 3 and the signal at TB1-23 while the conveyor is
running. LED 3 should pulse regularly and the signal at TB1-23
should be smooth and regular. If LED 3 pulses irregularly extra
encoder pulses are occurring.
• Check the encoder wiring for water shorting problems.
Error Number 24
This error indicates the high resolution encoder is scaled lower
than the minimum allowable distance. The minimum allowable
distance between the scaled encoder pulses must be greater than
1mm (0.040 inch).
To correct this error:
Increase the encoder prescaler until this error no longer occurs.
When decreasing the Prescaler value, the Calibrate Encoder Value
is automatically increased to compensate for the higher resolution.
Error Number 25
This error indicates the high resolution encoder is scaled lower
than the minimum allowable time. There must be a minimum of
1.0 ms between the encoder pulses at maximum speed.
To correct this error:
• Check the encoder cable and the connection at P6. This error
can be caused by noise on the encoder cable which connects to
P6.
• Increase the encoder prescaler value until this error no longer
occurs at high speed.
Industrial Dynamics Company, Ltd. Document 40255-0600
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