Mitsubishi Electric MELSEC iQ-R Series

A moderate error has occurred within a module. This error indicates a condition that, while not critical, impacts module functionality, and the "Moderate" setting is configured to stop the CPU. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

The system detected an issue during module verification. This error indicates a discrepancy or problem during the module's verification process. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

The system detected an issue during module verification. This error indicates a discrepancy or problem during the module's verification process. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

A fuse within the module or its associated circuitry has blown. This error indicates a potential overcurrent event or short circuit affecting the module's power supply, and the "Fuse Blown" setting is configured to stop. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

A major error has occurred within a module, regardless of specific "CPU Module Operation Setting at Error Detected" parameters explicitly configured to stop. This error indicates a serious condition that significantly impacts module functionality and system operation. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

A major error has occurred within a module, regardless of specific "CPU Module Operation Setting at Error Detected" parameters explicitly configured to stop. This error indicates a serious condition that significantly impacts module functionality and system operation. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

A critical error has occurred within a module. This error indicates a serious condition that significantly impacts module functionality, and the "Critical" setting is configured to stop the CPU. If the "Direct change setting" is enabled, the system might continue operation without stopping, but the error itself will persist.

This error occurs when a module is removed via a direct change procedure. It is signaled by the CPU module's READY LED flashing and the ERROR LED turning on, or by the remote head module's RUN LED flashing and the ERR LED turning on. This error remains active and the ERROR/ERR LED stays on even after a successful direct change until it is explicitly cleared.

This flag turns on when an error occurs during the module selection phase of an online module change. It indicates that an incorrect module has been specified or an invalid I/O number has been used, preventing the 'Online module changing status' (SD1617) from progressing to Module selection completion (2). The specific error is generally detailed in 'Online module change error code' (SD1618) but root causes are provided here.