OMRON NX102-1020 Modular CPU Unit

OMRON NX1 Series Machine Automation Controller (MAC, Modular CPU Unit)

Sysmac platform, integrating logic, motion and IT communication, a multi-axis motion control model for medium and small-sized equipment.

✅ Model Code Explanation

NX102: CPU of NX1 series; 1020: 2-axis synchronous interpolation + 4-axis PTP point-to-point, totale 6 physical axes (massimo. 15 axes including virtual axes), supports direct database connection.

📌 Core Specifications

Articolo	Specifica
Memoria del programma	5 MB
Variable Memory	33.5 MB (Retain area:1.5 MB, Non-retain area:32 MB)
Minimum Primary Task Cycle	1 SM
Synchronous Axes (Interpolation Axes)	2 assi
PTP Point-to-Point Axes	4 assi
Massimo. Axes including Virtual Axes	15 assi
EtherCAT	Master station, fino a 64 EtherCAT nodes; supports EtherCAT ring redundancy
Local Expansion	Fino a 32 NX units on NX local bus (I/O, sicurezza, IO-Link, ecc.)
Local I/O Points	1024 punti; espandibile a 8960 points with NX coupler
Porti	PORT1/PORT2: Ethernet/IP + TCP/IP; PORT3: EtherCAT
Built-in Protocols	OPC UA Server, Direct SQL Database Connection, MQTT
Software di programmazione	Sysmac Studio; Languages: ST (Structured Text), LD (Diagramma a scala), FB (Function Block)
Montaggio	Montaggio su guida DIN; Dimensioni:100(H)×66(W)×100(D) mm; Peso:470 G
Alimentazione elettrica	NX power supply unit sold separately (NX-PF series); No built-in battery; Variables backed up by capacitor

🧩 Key Features

Controllo del movimento

EtherCAT bus servo, supports 2-axis synchronization (linear/circular interpolation) + 4-axis independent point-to-point. Suitable for transferring, picking, simple flying shear and synchronous conveying.

IT Integration (Sysmac Unique Feature)

Direct SQL Connection: Read/write MySQL, SQL Server, Oracle and other databases directly without upper computer relay

OPCUA: Native OPC UA server for connecting to MES and SCADA

MQTT: Connect to cloud platform for equipment data upload

Espansione del sistema

NX local bus can mount digital/analog modules, safety controller NX-SL, IO-Link master station; EtherCAT can connect servos, remote I/O and sensors.

Battery-free Design

Capacitor backup for retaining variables. No regular battery replacement required to reduce maintenance cost.

🛠️ Scenari applicativi tipici

Medium and small automation equipment: macchine confezionatrici, macchine etichettatrici, transfer manipulators, lithium battery front-end equipment, inspection machines and small production lines.

📊 NX102 Series Comparison (For Selection Reference)

NX102-1020: 2 assi sincroni + 4 PTP axes, totale 6 physical axes (questo modello)

NX102-1100: 4 assi sincroni + 4 PTP axes, totale 8 physical axes

NX102-1200: 8 assi sincroni + 4 PTP axes, totale 12 physical axes

⚠️Note

No built-in power supply for CPU, NX-PF power supply module must be equipped separately;
SD card slot for program backup and log recording;
Direct database connection and MQTT require corresponding firmware version of Sysmac Studio;
Second-hand inspection points: Check firmware version, EtherCAT port, Ethernet port and SD card slot upon power-on; back up programs and test axis control.

📎 Alternative Solutions Reference

Same brand upgrade: NX102-1100 (more synchronous axes)

Lower version on same platform: NX1P series (integrated type, no NX local bus expansion capability)

OMRON NX102-1020 Troubleshooting Checklist

Troubleshooting Principle: Check LED indicators first → Read Event Log online via Sysmac Studio → Distinguish Fatal Fault (Machine Stop) / Minor Fault (Continue Running) / Information Event. Eliminate root cause before resetting instead of clearing fault codes directly. Reference Manual: W503 (NJ/NX Fault Manual), NX102 Hardware Manual

Power-on Failure, CPU Not Running (POWER Off / Solid Red)

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
POWER LED off	Damaged NX-PF power module, no power supply, cablaggio allentato, excessive DC24V voltage drop	1. Measure AC/DC input of power module; 2. Check backplane power terminals on DIN rail; 3. Test by replacing NX-PF power unit; 4. Check grounding and short circuit
POWER solid red, cannot enter RUN	Serious CPU hardware fault, internal bus error, non-volatile memory damage, sovratemperatura	1. Power off and cool for 30 minutes then power on; 2. Check event log: 00110000(Overtemp)/000D0000(Internal Bus)/000E0000(Flash End-of-Life); 3. Remove all NX expansion modules, run minimal system with only CPU + Alimentazione elettrica; 4. If fault persists under minimal system → CPU hardware failure, replace CPU
Repeated reboot after power-on	Insufficient power rating, backplane short circuit, EMC noise interference	1. Calculate total power consumption of NX rack; 2. Check metal debris on backplane; 3. Separate power cables and control cables and improve grounding

Cannot Connect via Sysmac Studio (PORT1/PORT2 Ethernet Port)

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
Ping failure, NET ERR red	IP mismatch, Windows firewall, damaged cable/connector, hardware damage of Ethernet port	1. Set PC IP to same subnet, turn off Windows firewall; 2. Sostituire il cavo schermato, check L/A link lamp of PORT1/PORT2; 3. Reset CPU IP via BOOTP; 4. Test with PORT2; single port failure mostly indicates hardware damage
Ping OK but online download failed	Mismatched engineering version, CPU write protection, SD card abnormality	1. Ensure Sysmac Studio firmware compatible with CPU firmware; 2. Check whether CPU write protection is enabled; 3. Remove SD card and retry; 4. Verify hardware configuration matches actual rack
Project download error, configuration verification failed	Mismatched model/quantity of NX local bus modules in project	1. Verify model and position of NX modules on rack; 2. Remove redundant modules and test minimal rack; 3. Upload hardware configuration again

EtherCAT Bus Fault (PORT3, Most Common in Motion Control)

NX102-1020 built-in EtherCAT master; axis control and remote I/O run on this bus. For EtherCAT fault, use Sysmac EtherCAT diagnosis and frame error counter to locate faulty segment

NX Local Backplane Bus Fault (NX Rack Expansion I/O, Safety Module NX-SL)

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
ERR lamp on NX expansion unit, Event Log 000D0000	Contatto scadente con il backplane, damaged module, mismatched module model in configuration	1. Spegnimento, re-plug NX modules and ensure buckles locked; 2. Remove modules one by one to locate faulty unit; 3. Verify module model and position in project; 4. Replace damaged NX unit

Motion Control Fault (NX102-1020: 2 Interpolation Axes +4 PTP Axes)

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
Axis homing failed	Wiring of home sensor, limit signal, home parameter, servo not ready	1. Monitor status of home, positive/negative limit I/O; 2. Check servo ready signal; 3. Verify homing mode and offset parameters; 4. Confirm no hardware limit triggered
Motion error alarm during point-to-point / interpolazione	Soft limit, over speed/acceleration, axis lock, servo fault, insufficient task cycle	1. Check motion event code; 2. Verify soft limit parameters; 3. Reduce acceleration; 4. Confirm no stop/lock command on axis
Large multi-axis synchronization deviation, flying shear synchronization failure	EtherCAT cycle fluctuation, abnormal encoder feedback, incorrect sync parameter	1. Monitor position feedback of each axis; 2. Check encoder wiring; 3. Adjust synchronization control parameters; 4. Eliminate bus interference

Built-in Communication Fault (OPCUA / MQTT / Direct SQL Database Connection)

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
OPC UA client connection failed	Porta, security policy, certificate, IP routing, firewall	1. Confirm CPU OPC UA service enabled; 2. Verify certificate trust; 3. Check port open status; 4. Confirm network route reachable
MQTT cloud upload failed	Wrong Broker address/port, network unreachable, certificate, heartbeat parameter	1. Ping MQTT server; 2. Verify account, password and TLS setting; 3. Check MQTT event codes in event log
SQL database read/write failure	Database IP/port, account permission, driver, packet loss	1. Confirm database allows external access; 2. Verify table name, field and SQL statement; 3. Check CPU firmware version (old firmware does not support partial databases)

SD Card Related Fault

Fenomeno	Possibile causa	Passaggi per la risoluzione dei problemi
SD card ERR alarm, backup/log recording failed	Damaged SD card, incorrect format, exceeded capacity limit, scarso contatto	1. Take out SD card and reinsert; 2. Use FAT32 format and OMRON recommended industrial SD card; 3. Replace damaged card; 4. Avoid consumer SD cards which easily cause log loss

Ambientale & Aging Hardware Faults
Overtemperature Alarm (00110000): Poor cabinet heat dissipation, dust-clogged fan, ambient temperature out of range. Clean dust, migliorare la ventilazione; protection shutdown triggered above 60℃.
Non-volatile Memory Life Warning (000E0000): Flash write/erase cycles exhausted. Prepare CPU replacement; frequent variable/log writing accelerates aging.
Accidental shutdown due to noise interference: Power cables run in parallel with control cables, poor grounding, no shielding. Separate wiring, single-point grounding and add surge absorber.
Fast Troubleshooting Workflow (On-site Operation Sequence)
Power off → Visual inspection: cablaggio, module buckles, damaged cables, polvere, short-circuit traces
Power on and record all LED status (POWER/RUN/ERR, EtherCAT, Ethernet L/A)
Go online with Sysmac Studio, read Event Log and record hex event codes
Minimal system test: NX-PF power + NX102-1020 only, remove all NX expansions and EtherCAT slaves to judge whether fault lies in CPU or external peripherals
Segmented isolation: Disconnect EtherCAT segment by segment / remove NX modules one by one to locate faulty unit/cable
Fix root cause → Clear fault → Reset CPU and retest
Seconda mano / Used NX102-1020 Special Inspection Checklist
Aspetto: Burn marks, oxidized backplane metal contacts, dents or deformation on housing
Power on minimal system, confirm normal POWER without fatal hardware fault
Go online to read firmware version and event log, check historical faults (flash life, overtemperature records)
SD card slot read-write test
Link test for PORT1/PORT2 Ethernet and PORT3 EtherCAT port
Download blank project to confirm no configuration download error
Connect EtherCAT servo to test axis enable and basic point-to-point motion

OMRON NX102 Full Series Model List (NX1 Modular Machine Automation CPU)

Regola di codifica del modello:

NX102-ABCD

AB: Axis specification; CD: Function version

Suffisso -00 = Standard Version (No direct database connection)

Suffisso -20 = DB Database Version (Support direct SQL connection & time-series data acquisition, same as NX102-1020)

All models share identical base hardware: 5Memoria di programma MB / 33.5MB variable memory (1.5MB retain area), EtherCAT master, dual EtherNet/IP ports, NX local backplane bus, minimum task cycle 1ms

Versione standard (-00, No Direct SQL Database Connection)

Modello	Synchronous Interpolation Axes	PTP Axes	Massimo. Physical Axes	Descrizione
NX102-1200	8 assi	4 assi	12 assi	High-end model, sincronizzazione multiasse, taglio volante, camma elettronica, for multi-axis equipment
NX102-1100	4 assi	4 assi	8 assi	Medium synchronous axes, for transfer and synchronous conveying
NX102-1000	2 assi	4 assi	6 assi	Basic interpolation model, same axis capability as NX102-1020, without database function
NX102-9000	0 asse	4 assi	4 assi	No interpolation, soltanto 4 independent point-to-point axes; for general sequence control + simple point motion, no synchronous interpolation

Database Connection Version (-20, Support Direct SQL & Time-series Data, SD Card Included)

Modello	Synchronous Interpolation Axes	PTP Axes	Massimo. Physical Axes	Descrizione
NX102-1220	8 assi	4 assi	12 assi	Top model, multi-axis sync + direct database connection, MES docking and data acquisition
NX102-1120	4 assi	4 assi	8 assi	4 assi sincroni + database, for packaging and lithium battery mid-stream equipment
NX102-1020	2 assi	4 assi	6 assi	Questo modello, 2-axis interpolation + 4 PTP, supports SQL, MQTT, OPCUA
NX102-9020	0 asse	4 assi	4 assi	No interpolation, only PTP axes, with database, for production line data acquisition + simple point motion

Derivative Suffix Model (DH Version, Enhanced Time-series Data, Special Order)

NX102-1220-DH / NX102-1120-DH / NX102-1020-DH / NX102-9020-DH

DH suffix: Enhanced time-series data acquisition, designed for massive data logging projects, special order item, rarely used in standard domestic projects

Special Supplementary Model

NX102-1D00: High-capacity logic CPU, no motion axes, focused on large-volume logic processing, no EtherCAT motion control. Used for logic and communication management of large production lines.

✅ Quick Selection Comparison Points

1000 /1020: 6 physical axes (2 interpolazione +4 PTP). Same axis performance. The only difference: NX102-1020 supports direct SQL database connection, NX102-1000 does not.
9000/9020: No interpolation function, only single-axis point motion; linear/circular interpolation and electronic cam synchronization are unavailable.
All NX102 CPUs require separate NX-PF power supply module, nessun alimentatore integrato. Terminal cover NX-END02 is delivered together with CPU.
Maximum total axes including virtual axes: 15 assi (sum of physical + virtual axes).
Cross-reference on Same Platform (Other NX1 Series CPUs for Selection)