Manual | Idec Plc Fa2j
Connection to a PC requires an RS-232 link adapter ( PF2-CLA ) and specific interface cables ( PFA-1A51 and PFA-1A54A ). Available Technical Resources
Do not turn off the main panel power before replacing the battery if you do not have a backed-up copy of the program! If the battery is completely dead and power is cycled, the program will be permanently lost. Leave the PLC powered on.
Given the lack of a native PDF manual, the following alternative resources have become the de facto standard documentation for engineers maintaining or programming FA2J systems. idec plc fa2j manual
Indicates the CPU is actively executing the ladder program.
When using standard switches or relay contacts, use the internal 24V DC service power supply provided on the PLC terminal strip. Connection to a PC requires an RS-232 link
Lights up when the internal 5V DC voltage is normal.
AND X000 ; Check if Input 0 is ON in series OR X001 ; Check if Input 1 is ON in parallel OUT Y020 ; Turn ON Output 20 if logic is true TIM T000 50 ; Initialize Timer 0 for 5.0 seconds (50 x 100ms) CNT C000 10 ; Initialize Counter 0 for 10 counts Use code with caution. Basic Ladder Logic Structure Example Leave the PLC powered on
One interesting feature detailed in the is its replaceable relay system within a flat-pack modular design . This design allows you to maintain high reliability in harsh industrial environments without needing to replace entire modules when a single relay reaches its end-of-life. Key Technical Features
Solid ON: Fatal CPU hardware failure, memory corruption, or watchdog timer timeout. Try cycling power. If it persists, the CPU must be replaced.
The FA2J manual is divided into several sections covering installation, hardware configuration, and programming.
Used for internal logic flags and interlocking. Timers (T): Used for time-delay operations. Counters (C): Used for event counting. Core Instruction Set The FA2J manual defines several standard instruction sets: Description LOD Starts a new logic rung with a normally open contact AND Connects a normally open contact in series OR Connects a normally open contact in parallel OUT Drives an output coil or internal relay TIM Initiates a timed delay-on circuit CNT Counts distinct pulses before closing a contact Maintenance and Battery Replacement
