ACU-RITE DRO 100 - Manual (Page 22)

DRO 100 Troubleshooting
17
Display test Begin by pressing the ZERO key. All indicators in all displays will
light. Visually check each portion of each display to ensure that they are
functioning properly.
Press ZERO again to test the display electronics. All decimal points on all displays
will light momentarily, then each segment of all displays will light in turn. Press
ZERO 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 ZERO 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 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, positioning information may no longer be accurate. Press
any key to clear the error message. All display measurements will be zeroed.
Refer to page 3 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 any 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.
•
If the problem remains in the same display, the readout is in error.
• If the problem follows the connection change, the linear encoder may be in
error. Refer to the Checking the Linear Encoders section of your encoder
reference manual.
Display overflow errors are indicated by dashes in all digits in an axis display.
A numeric overflow occurs when the intended measurement is too large for the
eight-digit display. Clear the error by returning the machine axis into an area