Code ISD-023: Meter switching fault (ISD%d)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Meter switching fault (ISD%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: This warning is posted when the inactive meter could not finish reloading before the active meter reaches the Near-Empty position. This is where the sub-meter should start dispensing for meter switching. This condition is usually caused by one or more of the following: z The supply pressure was not high enough. z The Near-Empty location is set too early. z The PLC did not send the RELOAD_OK early enough. Remedy: z Make sure material supply pressure is high enough. z Make sure the Near-Empty location is set properly. z Nake sure the PLC sends the RELOAD_OK on time.
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 ISD-023 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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