Troubleshooting Omron Sysmac CJ2M CPU33 Error with 24v PSU Supply Issues

Question:

Hello, I am seeking assistance with a customer's CPU experiencing issues with the 24v PSU supply and now displaying an error state. I am unfamiliar with this system, so any guidance would be greatly appreciated. The CPU is showing error codes ER E1 IP 2 with a solid green Run LED, solid green MS LED, and flashing red NS LED. The PLC rack also contains module NX-EIC202 with only the I/O Power LED illuminated in green. Any insights or advice on troubleshooting would be helpful.

Top Replies

If you're seeing Error E1, it may mean that the ethernet link isn't being detected on page 235 of the CJ2 CPU units hardware user manual. IP 2 can help identify the specific port causing the issue. For more information, refer to the manual available for download at the link provided.

According to DarrylR, the error code E1 signifies that the "ethernet link is not detected" on page 235 of the CJ2 CPU Units Hardware User's Manual. IP 2 may identify the specific port in question. For further details, refer to section 3-1-2 on page 109 of the manual. Click the link to access the manual: https://assets.omron.eu/downloads/latest/manual/en/w472_cj2_cpu_units_hardware_users_manual_en.pdf

Hi there! The error codes you're providing suggest an issue with the I/O communication, potentially a detected fault. Given that the I/O Power LED is green on your NX-EIC202, it is functioning properly and receiving power. It's the communication stratum that is likely compromised here. Try doing a reinitialization of the CPU and then monitor the pattern of the NS LED (Network Status). If the error persists, you might want to check your cables or perhaps the inputs and outputs connected to the module. A good grounding practice is essential too. Remember to ensure that the PLC and all its connected devices share a common ground.

Hi there, it seems like the error codes indicate an issue with the CPU startup, possibly an error with the memory initialization. With the LEDs, the solid green Run and MS LEDs imply the system is in run mode and memory battery working. The flashing red NS LED however, indicates network or communication issues. As for the module NX-EIC202, the I/O power LED being the only one illuminated might suggest an interruption with data exchange or an initialization problem. First, ensure all connections are secure and modules are properly plugged in. Check if the PSU supply issues have led to some memory loss or corruption. You may need to try resetting the system or even replacing the module if issues persist. Always backup the system frequently to prevent major data loss. Consult your system manual for more detailed troubleshooting steps.

Hi there! Your issue sounds like it could be power or communication related, given the error codes and LED indications. For starters, try resetting the system to clear the error. If the error still persists, verify that the 24v PSU supply is providing a stable power output to the CPU. Since the I/O Power LED of the NX-EIC202 is illuminating green, it seems to be working fine, which leads me to suspect the communication between the module and the CPU. You may want to inspect for any damage to communication cables or connections. Additionally, check the configuration settings of the PLC and be sure that they match the setup. If problems still exist, you might want to consider reaching out to the manufacturer or a trained professional for further assistance.

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Frequently Asked Questions (FAQ)

FAQ: 1. What do the error codes ER E1 IP 2 indicate on an Omron Sysmac CJ2M CPU33?

Answer: - The error codes ER E1 IP 2 indicate specific issues with the Omron Sysmac CJ2M CPU33. In this case, it seems to be related to the 24v PSU supply problem.

FAQ: 2. What do the different LED statuses (solid green Run LED, solid green MS LED, flashing red NS LED) on the CPU and PLC rack modules signify?

Answer: - The solid green Run LED and MS LED indicate that the CPU is powered and running, while the flashing red NS LED may suggest a specific fault or issue that needs attention. The illuminated green I/O Power LED on the module NX-EIC202 indicates that the input/output power is functioning.

FAQ: 3. How can I troubleshoot issues with the 24v PSU supply on the Omron Sysmac CJ2M CPU33?

Answer: - Troubleshooting the 24v PSU supply issues may involve checking the power supply unit, connections, wiring, and related components for any faults or malfunctions. It may also include verifying the voltage output and ensuring proper power distribution within the system.

FAQ: 4. Are there any specific steps or procedures recommended for troubleshooting the displayed error state on the Omron Sysmac CJ2M CPU33?

Answer: - Some general troubleshooting steps may include reviewing the system's documentation for error code interpretations, checking for loose connections or faulty

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