The dust in the textile mill didn't bother the FA2J. It had lived in a shallow, gray control box since 1991, humming at a steady frequency that only the night shift electrician, Elias, seemed to notice.
IDEC WindLDR (older versions, such as v4.0 or v5.0, or specific legacy compatibility bundles) supports the FA series. A specialized serial conversion cable (RS-232 to TTL or specialized IDEC link adapter) is required to interface a modern PC with the PLC's circular peripheral port. Basic Mnemonic Command Set
I can provide the precise pinout diagrams or instruction codes you need. Share public link
directly at (800) 262-IDEC, as they maintain archives of older documentation not always available on their current web portal. Newark Electronics instruction list for a particular FA2J model? IDEC FA2J PLC Specifications Guide | PDF - Scribd
While the newer "Smart" controllers in the main office bragged about their Wi-Fi and cloud-syncing, the FA2J simply did its job: 6 milliseconds per 1,000 steps, over and over, for thirty-five years. It controlled the "Big Loom," a mechanical beast that turned raw thread into heavy denim. Its 4K memory module held the entire logic of the machine—every timer, every counter, every relay—in just over 3,000 steps of ladder logic.
Clear memory, re-upload the program code, and check memory cassette seat. Battery voltage low (if RAM configuration is used).
The FA2J can be integrated into modern SCADA systems using OPC servers and specific communication drivers.
Capable of handling both AC and DC voltages (up to 250V AC / 30V DC, max 2A per point). Inductive loads (solenoids, contactors) require external surge suppressors (RC snubbers for AC, diodes for DC) to protect the internal relay contacts.
: Available in 1K (964 steps) or 4K (3,300 steps).
Use a dedicated ground wire (Class 3 grounding or better) to minimize electrical noise.
The FA2J features a low-profile, modular design that permits high-density component installation. The system branches out from a central processing unit (CPU) connected to expansion bases and power options. Core CPU Modules