Manual warning: Do not exceed 30V DC on inputs. Unused inputs must be terminated or programmed as unused.

| Instruction | Function | |-------------|----------| | LD | Normally open contact | | LDI | Normally closed contact | | AND | Series NO contact | | OR | Parallel NO contact | | OUT | Coil output | | TIM | Timer (e.g., TIM T0 K100 = 10 sec) | | CNT | Counter (e.g., CNT C0 K5) | | MOV | Move data (D0 → D1) | | CMP | Compare values |

Q: Can I use a microSD card to store the FA2J program? A: No. The FA2J manual makes no mention of removable storage. The program is stored in EEPROM. To save a backup, you must use WindLDR on a PC.

Q: What is the replacement for the FA2J? A: IDEC suggests migrating to the MicroSmart FC6A series. The manual for the FA2J includes an appendix showing how to convert FA2J ladder logic to FC6A using the "WindLDR to FC6A Converter" tool.

Q: The manual mentions a "Battery" – where is it? A: The FA2J-CPU models use a lithium battery (CR2032) to retain the data registers (D) and internal relays (M) during power loss. The manual specifies changing this battery every 5 years. Location: Under the front access cover.

The IDEC FA2J is a micro-sized, high-performance Programmable Logic Controller (PLC) designed for small-scale automation tasks. It is part of IDEC’s legacy FA series, bridging the gap between simple relay replacement and complex control logic. The physical manual (Part number: various revisions under FA2J-UM) details hardware installation, wiring, memory mapping, and basic instruction sets.

| Feature | IDEC FA-2J | Modern Nano PLC (e.g., Click PLUS, Micro810) | |---------|------------|-----------------------------------------------| | Price (used/new) | $20–50 used | $100–150 new | | Software | Abandonware, requires VM | Free, modern, Win 10/11 | | Programming | Ladder only | Ladder, FBD, ST (basic) | | Memory | 200 steps | 4k–8k steps | | Comms | None | Ethernet, USB, Modbus | | Expandability | None | Up to 128 I/O | | Support | None | Active tech support |

Idec Plc Fa2j Manual May 2026

Manual warning: Do not exceed 30V DC on inputs. Unused inputs must be terminated or programmed as unused.

| Instruction | Function | |-------------|----------| | LD | Normally open contact | | LDI | Normally closed contact | | AND | Series NO contact | | OR | Parallel NO contact | | OUT | Coil output | | TIM | Timer (e.g., TIM T0 K100 = 10 sec) | | CNT | Counter (e.g., CNT C0 K5) | | MOV | Move data (D0 → D1) | | CMP | Compare values | idec plc fa2j manual

Q: Can I use a microSD card to store the FA2J program? A: No. The FA2J manual makes no mention of removable storage. The program is stored in EEPROM. To save a backup, you must use WindLDR on a PC. Manual warning : Do not exceed 30V DC on inputs

Q: What is the replacement for the FA2J? A: IDEC suggests migrating to the MicroSmart FC6A series. The manual for the FA2J includes an appendix showing how to convert FA2J ladder logic to FC6A using the "WindLDR to FC6A Converter" tool. | Instruction | Function | |-------------|----------| | LD

Q: The manual mentions a "Battery" – where is it? A: The FA2J-CPU models use a lithium battery (CR2032) to retain the data registers (D) and internal relays (M) during power loss. The manual specifies changing this battery every 5 years. Location: Under the front access cover.

The IDEC FA2J is a micro-sized, high-performance Programmable Logic Controller (PLC) designed for small-scale automation tasks. It is part of IDEC’s legacy FA series, bridging the gap between simple relay replacement and complex control logic. The physical manual (Part number: various revisions under FA2J-UM) details hardware installation, wiring, memory mapping, and basic instruction sets.

| Feature | IDEC FA-2J | Modern Nano PLC (e.g., Click PLUS, Micro810) | |---------|------------|-----------------------------------------------| | Price (used/new) | $20–50 used | $100–150 new | | Software | Abandonware, requires VM | Free, modern, Win 10/11 | | Programming | Ladder only | Ladder, FBD, ST (basic) | | Memory | 200 steps | 4k–8k steps | | Comms | None | Ethernet, USB, Modbus | | Expandability | None | Up to 128 I/O | | Support | None | Active tech support |

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