ACU-RITE DRO 200T - Manual (Page 33)

Troubleshooting DRO 200T
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Keypad test. Begin by pressing the X key, and then press each key (except
the X key) in turn to verify that it is functioning properly. When a key is
pressed, the X-axis activates a “plus sign” indicator and increments a count. When
you release the key, the plus sign disappears.
Display test. Begin by pressing the
X
key. All indicators in all displays will
light. Visually check each portion of each display to ensure that they are
functioning properly.
Press X again to test the display electronics. All decimal points on all displays
will light momentarily, and then each segment of all displays will light in turn.
Press
X again, and each digit of all displays will light, one digit at a time,
starting with the leftmost digit and moving to the right.
Exit the diagnostics by pressing the X key.
Other Errors
The readout includes built-in test and error-checking circuitry. This circuitry
identifies errors that occur, and reports the problem to the operator. Errors are
reported by scrolling messages in the X-axis display.
Loss of power is indicated by the “Power was off” message. Loss of power means
that power to the readout has been interrupted. Since power to the encoders has
also been interrupted, position information may no longer be accurate. Press the
CLEAR key to clear the error message. All display measurements will be zeroed.
Refer to page 4 for information about position recovery.
Counting errors are indicated by the “Scale miscount” message, telling you in
which axis the miscount occurred. Counting errors result from distorted electrical
signals from an encoder. These signals can be a result of an encoder malfunction,
misalignment, mounting problems, or electrical interference. Press the
CLEAR key to
clear the error message. The axis display (for both absolute and incremental
measurements) will be zeroed. Follow these steps to determine if your difficulties
are associated with the readout or with the encoder.
• Ensure that the linear encoder connectors are correctly seated.
• Swap linear encoder cables at the readout to see if the problem still appears in
the same display.