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Troubleshooting
Problem
The Power/Calibration indicator will not come on.
Solution
• Make sure that the SmartPrecision electronics’ 25-pin HD connector is fully seated and connected.
• Confirm that +5 Volts DC is being applied to pin 24 on the SmartPrecision electronics’ 25-pin HD connector and that pin 25 is connected to ground.
Problem
None of the SmartPrecision electronics’ LEDs turn on.
Solution
• Refer to the Grounding Reference Guide on pg. 9.
Problem
Can't get the SmartPrecision electronics’ "Signal" LEDs better than red or yellow; or the green, “ Proper Alignment” indicators
don't stay illuminated over the full length of the scale.
Solution
• Verify that each sensor head has been aligned to the scale and that the mounting screws are tight. Check the dimensions for the
mechanical mounting holes (and clamps if any) to make sure that each sensor is correctly located over the scale. Refer to the appropriate
interface drawing.
• Check that each scale is firmly mounted and can't jiggle or move in other than the intended direction.
• Make sure that each scale is clean over its entire length or circumference.
Problem
The green Power/Calibration indicator is flashing unexpectedly.
Solution
• Part of the normal setup procedure is to activate the SmartPrecision electronics’ index capture process by pressing the recessed button on the
SmartPrecision electronics’ connector body, once for sensor 1 and twice for sensor 2. Each Power/Calibration LED will begin to flash until the
index mark on the scale passes under each sensor at least one time.
Problem
Can't complete the Capture Index process - the green Power/Calibration indicators don't stop flashing.
Solution
• Verify that each sensor is mounted in the correct orientation to the scale for the desired index mark. Refer to the interface drawing.
• Refer to step 5 of the installation procedure to insure proper operation.
Page 24
Serial Data Format
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9 8 7 6 5 4 3 2 1 03
4
3
3
3
2
8bit status
format 0
32105467
28bit Position Word
format 0
3
5
8bit status
format 1
3 2 1 05 467
28 bit Position Word
format 1
Serial Output Specification