| 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 |
Here are the basic steps to program the IDEC PLC FA2J:
The IDEC FA-2J, often referred to as the FA-2Junior, is a compact and modular PLC designed for a wide range of control applications. Known for its rugged design, it was built to withstand demanding industrial environments, offering wire termination capabilities up to 60°C. Key features of the FA-2J include:
By combining these resources, you can effectively maintain your legacy IDEC FA-2J systems, ensuring they continue to operate reliably for many years to come. Good luck with your automation endeavors. idec plc fa2j manual
These memory areas are essential for mapping PLC data to HMI tags and SCADA points.
Despite the obsolescence, the is a useful historical/educational document because it teaches:
The internal backup battery lasts approximately 5 years under normal operating temperatures. I/O Expansion | Instruction | Function | |-------------|----------| | LD
Connects a contact in series (normally open / normally closed).
Programming for the FA-2J can be handled via hand-held hardware or Windows-based software.
Keep the PLC powered ON while replacing the battery to prevent the RAM memory from erasing. If you must change it while powered off, complete the swap within data-retention limits (usually under 1-2 minutes). Troubleshooting Error Codes Good luck with your automation endeavors
Replaceable electromechanical relays, transistor, or SSR modules 8-bit or 12-bit analog inputs, multiplexer options Power Supply 100 to 240V AC (85-110% allowable) or 24V DC (±20%) Dielectric Strength
The IDEC FA2J is a compact, modular PLC typically used in legacy automation systems. Key attributes include: