OMRON NX102 Hardware Installation Guide

Troubleshooting: Power on again after a power outage. If it still stays on, using Sysmac Studio for fault diagnosis may require replacing the CPU unit.

Case 3: Some NX units do not work, but the CPU is normal

Possible reasons: Insufficient power supply to NX unit, or I/O power not provided, or incorrect unit configuration.

Troubleshooting: Calculate if the total power consumption exceeds 10W. Check if the unit is securely plugged into the bus connector. Use Sysmac Studio to check if the unit configuration matches the actual situation, and perform 'synchronization' if necessary.

Case 4: EtherCAT communication abnormality, NET ERR flashing

Possible reasons: duplicate node address from the substation, cable disconnection or length exceeding 100m, topology error.

Troubleshooting: Check the uniqueness of node addresses for all slave stations; Use shielded CAT5e or above twisted pair cables; If using a ring topology, the project unit version 1.40 or above and the cable redundancy function must be enabled.

Case 5: SD card not recognized or backup failed

Possible reasons: incorrect SD card format (requiring FAT32 or FAT16), expiration of card lifespan, incorrect DIP switch settings.

Troubleshooting: Format SD card using Sysmac Studio; Check the DIP switch pin 2 (automatic transmission) and pin 1 (safe mode) settings; Replace the SD card recommended by OMRON.

Quick check of DIP switch function

There are four DIP switches (pins 1-4) at the bottom of the NX102 CPU unit:

Pin function ON/OFF

1. Backup execution is normal

1 and 2 restore pin 1=ON, pin 2=OFF -

1,2,3 automatic transmission pins 1=OFF, 2=OFF, 3=ON -

1, 2, 3, 4 safety mode pins 1=ON, 2=OFF, 3=OFF, 4=OFF -

1, 2, 3, 4 allow connection pins 1=OFF, 2=OFF, 3=ON, 4=ON to Sysmac Studio/NA that do not support secure communication

Safe mode: After power on, it directly enters the Program mode without executing user programs, making it easier to troubleshoot.