Mitsubishi Electric FX3S User Manual (English)

Questions and Answers:

R
Randy GuzmanAug 3, 2025
What to do if the Power LED is flashing on my Mitsubishi Electric FX3S?
- G
  garciawilliamAug 3, 2025
  If the Power LED is flashing, it could be due to several reasons: the power supply not providing the correct voltage and current, incorrect external wiring, or an internal error within the PLC. First, check the supply voltage. Then, disconnect all cables except the power cable, and re-apply power to the PLC to see if the state changes. If the problem remains, it may indicate an internal error.
H
Holly DayAug 14, 2025
What to do if ERR LED is flashing on Mitsubishi Electric Controller?
- M
  Mrs. Vickie HarrisonAug 14, 2025
  If the ERR LED is flashing, the PLC has encountered an error such as a parameter error, syntax error, or ladder error. Perform a PLC diagnosis and program check using the programming tool to identify and resolve the specific error.
J
Justin HardingAug 21, 2025
Why is the Power LED OFF on my Mitsubishi Electric FX3S?
- A
  Alicia JacobsAug 21, 2025
  The Power LED might be OFF because the power supply is off, the external wiring is incorrect, the specified voltage isn't reaching the power supply terminal, or the power cable is broken. If the power is on, check the power supply and its route. Also, disconnect all cables except the power cable and re-apply power to the PLC to check for any changes.
D
deleonluisAug 27, 2025
What to do if the ERR LED is OFF but Mitsubishi Electric Controller operations are abnormal?
- Y
  yreedAug 27, 2025
  If the operations of the PLC are abnormal, perform PLC diagnosis and program check with the programming tool. An I/O error, Comms error or Runtime error may have occurred.

Mitsubishi Electric FX3S Specifications

General

Model	FX3S
Type	Compact PLC
Input Voltage	100-240V AC
Power Supply	Built-in
Number of Inputs	32
Communication Ports	RS-422/RS-485 (built-in)
Programming Language	Ladder Logic, Instruction List
Data Memory	8000 words
Operating Temperature	0 to +55°C
Weight	0.5 kg
Number of Outputs	6, 8, 16, or 32 (depending on model)