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TROUBLESHOOTING
1-29August 9, 2005
D SERIES CONTROLLER
TROUBLESHOOTING AND COMPONENT REPLACEMENT
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ERROR CODE D1500 Encoder misread error JtXX.
Immediately after control power on, steady encoder data is not able to be read. This
error is caused by a disconnected encoder signal line or a short circuit, or a defect in the
main body of the encoder.
Encoder I/F
1KB board
Encoder power supply +12 V
Controller
Robot
Power circuit
Battery
Encoder
Encoder
1FG/1HG board
Main causes include:
1. Defective encoder or encoder harness.
2. Defective servo weld gun encoder (detected at controller power-up/power-down with
gun connected.
3. Servo weld gun is not connected.
4. Defective 1KB board.
5. Defective 1FG/1HG board.
⇒
Check for disconnection or short circuit in encoder signal line.
⇒
Replace the encoder or encoder harness.
⇒
Replace the 1KB servo board.
⇒
Replace the 1FG/1HG board.
⇒
Release the servo weld gun axis in teach mode and cycle controller power OFF and
ON.
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