Mitsubishi MELSEC User Manual

12 - 10
12.2 Troubleshooting Flowchart
12.2.6 When the "RUN" LED flashes
12
TROUBLESHOOTING
12.2.6 When the "RUN" LED flashes
If the "RUN" LED flashes, follow the steps below.
When the programs or parameters are written into the CPU module during STOP status
and then the RUN/STOP/RESET switch is set from STOP to RUN, the "RUN" LED of the
CPU module flashes.
Although this status does not mean the CPU module error, the CPU module stops the
operation. To set the CPU module into RUN status, reset the CPU module using the RUN/
STOP/RESET switch.
With this setting, the "RUN" LED turns on.
The "RUN" LED still flashes even when the RUN/STOP/RESET switch is set from RUN to
STOP and then to RUN after flashing.

Mitsubishi MELSEC Specifications

General

Category	Programmable Logic Controller (PLC)
Manufacturer	Mitsubishi Electric
Series	MELSEC
Programming Languages	Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), Instruction List (IL), Sequential Function Chart (SFC)
Communication Protocols	Ethernet, CC-Link, RS-232, RS-485, USB, Profibus, Modbus
Model Series	FX, Q, L, iQ-R, iQ-F
Input Voltage	100-240V AC, 24V DC (varies by model)
Memory Capacity	Varies widely depending on the CPU module and series. Ranges from kilobytes to megabytes.
I/O Points	16 to 8192 points (varies by model)
Communication Ports	Ethernet, RS-232, RS-485, USB (varies by model)
Programming Software	GX Works2, GX Works3, GX Developer
Operating Temperature	0°C to 55°C
Storage Temperature	-25°C to 75°C
Humidity	5% to 95% (non-condensing)
Vibration Resistance	10 to 57Hz, 0.075mm amplitude; 57 to 150Hz, 9.8m/s² acceleration
Shock Resistance	147m/s², 3 times in each direction (X, Y, Z)
Protection Class	IP20 (varies by model)
CPU Processing Speed	0.02μs to 0.1μs per instruction (varies by model)