Mitsubishi FX2NC-96MT Ultra-Compact Micro PLC

FX2NC ultra-compact micro PLC (DC24V powered, транзисторный выход, Конец срока службы / прекращено; only second-hand or stock spare parts available)

Пояснение кода модели

FX2NC: FX2N ultra-compact series (C = Compact)

96: Всего точек ввода-вывода 96 очки

М: Основной блок (интегрированный Процессор)

Т: Транзисторный выход (Sink type; high-speed pulse output for servo/stepper drive)

1. Core I/O Specifications

Вход: 48 points X0~X57, Вход стока 24 В постоянного тока

Выход: 48 points Y0~Y57, Транзисторный выход постоянного тока 24 В

Всего ввода-вывода: 96 очки; maximum expanded system I/O ≤256 points, input or output single direction ≤184 points

Источник питания: 24 В постоянного тока, voltage range DC24V -15% ~ +20%, peak-to-peak ripple ≤5%

Механический: Ultra-thin pluggable terminal structure, Монтаж на DIN-рейку; вес приблизительно. 0.45 кг

2. Программа & Память

Built-in RAM: 8К шагов (lithium battery backup)

Optional memory cards: FX2NC-EEPROM4C / 16С (with RTC real-time clock), FX2NC-EEPROM16 (no RTC); max program capacity 16,000 шаги

Языки программирования: Лестничная диаграмма, Последовательная функциональная схема SFC

Basic instruction execution speed: 0.08 мкс на инструкцию

Onboard real-time clock: Requires FX2NC-RTC or EEPROM card with RTC

3. Расширение & Коммуникация
4. Расширение: Direct connection to FX0N / FX2NC expansion blocks. To use standard FX2N modules, FX2NC-CNV-IF conversion adapter is mandatory.
5. Специальные модули: Supports FX2N-series analog I/O, позиционирование, CC-Link modules, limited by 5V bus current capacity.
6. Коммуникация: RS232 / RS485 via external ADP adapters (FX2NC-232ADP / 485ADP).
7. Host 5V power budget: Supplies power to expansion modules; must not exceed the host 5V current rating. Current load calculation required for expansion selection.
8. Suffix Variants

FX2NC-96MT-D: Base DC24V model

FX2NC-96MT-DS: 24 В постоянного тока, overseas specification

FX2NC-96MT-DSS: 24 В постоянного тока, dual sink/source output, UL сертифицирован

5. Прекращение производства & Варианты замены (Ключ)

✅ Official recommended drop-in replacement: FX3UC-96MT/D, highly compatible hardware and program; GX Works2 supports direct FX2NC program conversion.

✅ Next-generation upgrade option: FX5UC-96MT/D (iQ-F), более высокая производительность; wiring and program migration evaluation required.

Примечание: Not pin-for-pin interchangeable. Terminal layout, power logic and battery model differ. Электропроводка, expansion bus and battery backup must be rechecked for retrofit projects.

6. Типичные применения

Space-constrained compact automation, упаковочное оборудование, конвейерные линии, степпер / servo positioning control. Transistor outputs are designed for pulse servo drive; cannot directly drive high-power AC contactors.

7. Обслуживание & Распространенные неисправности
8. Модель аккумулятора: FX2NC-32BL lithium battery for program/register retention. Low-battery alarm via special registers; service life ~5 years, now end-of-life and spare parts scarce.
9. Распространенные неисправности

BATT LED ON: D8005 monitors battery voltage; risk of program/data loss.

ERR LED / Ошибка питания: Excessive DC24V fluctuation, high ripple, or overload on expansion 5V bus.

Нет входного ответа: Oxidation on plug-in terminals (very common failure point for FX2NC).

No pulse from Y outputs: Output common terminal wiring, load polarity or pulse instruction parameter errors.

3. Программное обеспечение: GX Developer / GX работает2; programming cable FX-USB-AW or RS422 download cable required.
4. Контрольный список проверки подержанного устройства (Spare Procurement)
5. Отсутствие следов подгорания на корпусе; plug terminal sockets intact with no pin corrosion or cracking.
6. Power on and check POWER / ERR LEDs; read battery voltage from D8005.
7. Verify EEPROM memory card read/write operation.
8. Force all X/Y I/O points one-by-one to confirm switching function.
9. Back up original program and verify firmware version.
10. Контрольный список программы миграции (FX2NC → FX3UC)
11. Upload FX2NC program in GX Works2 and save project.
12. Change PLC model within project to FX3UC-96MT/D, run program conversion, resolve incompatible legacy instruction errors.
13. Verify special M/D registers, high-speed counters and pulse output addresses.
14. Redesign expansion layout; remove FX2NC-CNV-IF (FX3UC directly supports FX3U modules).
15. Redraw terminal wiring diagrams: I/O addresses remain the same but physical terminal positions differ.
16. Re-evaluate battery replacement scheme and retentive register parameters.
17. No-lod power-on test, followed by loaded commissioning.
18. Сравнение моделей той же серии

FX2NC-16MT / 32МТ / 64МТ / 96МТ, identical architecture with increasing I/O count.

FX2NC (FX2NC-96MT) Код неисправности & Special Alarm Register List

Reading method: Monitor D8060~D8068 online in GX Developer/GX Works2; M80xx = alarm flags. D8004 stores the register number of the highest priority active error.

Hardware LED reference: BATT LED = battery alarm; ERROR flashing = program / parameter fault; ERROR steady ON = fatal CPU hardware fault

1. Core Alarm M Relays (M8060~M8068)

2. D Register Fault Codes (D8061/D8062/D8063)

D8061 (Hardware Error Codes)

D8062 (Programming Port / Peripheral Communication Errors)

D8063 (Parallel Link / 485ADP Communication Errors)

3. D8000~D8009 System Diagnostic Registers (Вспомогательный)

D8000: Watchdog timer setting (по умолчанию 100 РС)

D8001: PLC firmware version + объем памяти

D8002: Тип памяти (00H=RAM, 02H=EEPROM protection OFF, 0AH=EEPROM protection ON)

D8003: Backup memory error flag

D8004: Register number of highest priority active error (например. 8061 = hardware fault)

D8005: Battery voltage, unit = 0.01V (пример: 300 = 3.0V; alarm approx. below 2.7V)

D8006: Low battery detection threshold

D8007: Momentary power failure counter

D8008: Momentary power loss detection time

D8009: Starting I/O address of expansion unit with 24V loss (valid when M8009 = ON)

4. Special Module Faults (Аналоговый / Позиционирование / CC-Link)

FX2NC expansion special modules (FX2NC-4AD, 4И, 1PG, 32CCL, и т. д.) do not use D806x. Read BFM29 for module error codes via FROM instruction.

BFM29 b0=1: Module has any fault

б1: Offset/gain EEPROM abnormality

б2: Module 24V power fault

b3: Module hardware fault

b4: Misuse of FROM/TO instructions

Remaining bits vary by module type (позиционирование, CC-Link etc.)

5. Fast Troubleshooting Flow (FX2NC-96MT)
6. Check LEDs: BATT ON → battery fault; ERROR flashing → program/parameter; ERROR steady ON → CPU hardware fault
7. Monitor D8004 online to identify active M80xx fault source
8. Read corresponding D806x to get detailed error code
9. Operation faults M8067/M8068: Locate faulty instruction; M8068 requires manual reset
10. I/O bus error 6103: Inspect FX2NC expansion plugs and FX2NC-CNV-IF pins for oxidation (high frequency FX2NC failure)
11. Communication errors 62xx/63xx: Проверьте скорость передачи данных, cable shielding and terminating resistors
12. Differences vs FX3UC (Справочник по миграции)

FX3UC retains the M8060~M8068 system with extra alarm registers; base 61xx/62xx/63xx fault codes have identical definitions. Diagnostic logic can be reused after migration.

Мицубиси FX2NC Full Series Model List (MELSEC-F FX2NC Ultra-Compact PLC, all EOL discontinued)

Suffix Definition

Д: Питание 24 В постоянного тока; DS: overseas spec; DSS: dual sink/source output + сертификация UL

Т: pluggable connector; R = relay output; T = transistor output

All CPUs are DC24V powered. No AC powered FX2NC main units.

1. CPU Main Units

2. FX2NC Dedicated I/O Expansion Modules (Direct plug to FX2NC host, no CNV-IF)

Input Expansion (EX)

FX2NC-16EX / FX2NC-16EX-DS: 16-точечный вход 24 В постоянного тока (plug connector)

FX2NC-16EX-T / FX2NC-16EX-T-DS: 16-точечный вход 24 В постоянного тока (screw terminal block)

FX2NC-32EX / FX2NC-32EX-DS: 32-точечный вход 24 В постоянного тока

Output Expansion (EYT Transistor / EYR Relay)

FX2NC-16EYT / FX2NC-16EYT-DSS: 16-точечный транзисторный выход

FX2NC-16EYR-T-DS: 16-точечный релейный выход (винтовой терминал)

FX2NC-32EYT / FX2NC-32EYT-DSS: 32-точечный транзисторный выход

FX2NC-64ET: 64-point mixed I/O (32-in +32-out), транзисторный выход

Примечание: FX0N and standard FX2N expansion modules cannot plug directly into FX2NC. FX2NC-CNV-IF conversion adapter required.

3. Память, Часы & Option Boards

FX2NC-EEPROM-4C: 4K-step EEPROM card with RTC real-time clock

FX2NC-EEPROM-16C: 16K-step EEPROM card with RTC (common variant)

FX2NC-EEPROM-16: 16K-step EEPROM, no real-time clock

FX2NC-RTC: Real-time clock board (memory not included, adds RTC only)

FX2NC-ROM-CE1: Extended ROM board for inverter communication EXTR instruction

FX2NC-32BL: Backup lithium battery for program / register retention

FX2NC-10BPCB1 / FX2NC-100BPCB: Terminal adapter baseplate

4. Communication Adapters (side-mounted to CPU)

FX2NC-232ADP: RS232 communication adapter

FX2NC-485ADP: RS485 communication adapter (parallel link, Модбус)

5. Conversion Adapter

FX2NC-CNV-IF: Interface converter between FX2NC and FX0N/FX2N standard expansion modules (high-demand spare part)

6. Compatible General Special Modules (Requires FX2NC-CNV-IF)

FX2N series special modules, usable with FX2NC only via CNV-IF adapter

FX2N-4AD: 4-ch analog input

FX2N-4DA: 4-ch analog output

FX2N-4AD-PT: 4-ch PT100 RTD

FX2N-4AD-TC: 4-ch thermocouple

FX2N-1HC: High-speed counter module

FX2N-1PG-E: Single-axis pulse positioning module

FX2N-1RM-E: Programmable cam module

FX2N-32CCL: CC-Link slave module

7. System Key Points
8. Max total I/O for FX2NC system: 256 очки (host + FX2NC expansion + FX2N expansion combined)
9. All main CPUs are transistor output; FX2NC-16MR-T-DS is the only relay-output main unit
10. Two expansion families: FX2NC slim expansion direct plug; FX2N standard modules require CNV-IF adapter
11. All series discontinued; только б/у, pulled or leftover stock available. FX2NC-32BL backup batteries also becoming scarce.