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Code SVGN-237: Position error:(Eq:%d,Ln:%d)

Issue Description & Safety Warning

The Fanuc R-30i Series Robot Controller has triggered a critical Position error:(Eq:%d,Ln:%d) alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.

Official Troubleshooting Steps

Cause: Measured position error is greater than maximum allowable position error or less than min allowable position error." Remedy: Take the following actions. 1. Confirm the tip wear amount is correct. Re-execute the tip wear measurement when the tip wear amount is not correct. Note: if you take above action, re-execute the thickness check calibration. If this problem persists after taking the above actions, confirm that: 4.ERROR CODES B-83124EN-6/02 1. Max allowable Pos error (on gun teach setup screen) is large enough. 2. Min allowable Pos error (on gun teach setup screen) is small enough. If not, measured position error is made greater than min allowable position error and less than maximum allowable position error in the following ways. 1. Touch up correct position using jog or point touchup(not program touchup). 2. Increase maximum allowable position error or decrease min allowable position error on gun teach setup screen. Note: if initial position error is too large, program touchup cannot touch up. Fanuc recommends using point touchup(not program touchup) at the initial touchup. If this problem still persists after taking the above actions, take the following actions. 1. Confirm the position error offset in the spot program touchup setup screen. This alarm might be generated immediately after the position error offset is changed. 2. Confirm the parameter to correct position for Xgun in the spot program touchup setup screen. This alarm might be generated immediately after the parameter to correct position for Xgun is changed. If this problem persists after taking the all actions, perform the following actions: 1. Acquire the diagnostic data. See the procedure for diagnostic data collection at Troubleshooting section. 2. Contact your kocal FANUC representative.

Source: FANUC Robot R-30iA Alarm Code List Operator's Manual

Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.

About Fanuc R-30i Series Robot Controller Alarms

Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code SVGN-237 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.

Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.

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