Omron · NJ/NX-series Machine Automation Controller
Initialization of internal position data was not processed correctly in Semi-closed Control Mode and Absolute Value Mode. This implies a failure to correctly establish the encoder's initial position, affecting control accuracy.
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Inspect all encoder cable connections at both the absolute encoder and the Omron NJ/NX controller for looseness, damage, or incorrect pinout.
Measure the supply voltage at the absolute encoder input terminals to confirm it meets the encoder manufacturer's specifications.
Verify the absolute encoder parameters and settings within the Omron NJ/NX controller, including encoder type, resolution, and absolute position initialization method, against the machine's configuration documentation.
Check for any signs of electrical noise or interference affecting the encoder signal cable, especially in proximity to power cables or inductive loads.