Mitsubishi MELSEC User Manual

12
TROUBLESHOOTING
12.2 Troubleshooting Flowchart
12.2.5 Flowchart for when the "RUN" LED turns off
12 - 9
9
EMC AND LOW VOLTAGE DIRECTIVES
10
LOADING AND INSTALLATION
11
MAINTENANCE AND INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
12.2.5 Flowchart for when the "RUN" LED turns off
The following shows the flowchart for when the "RUN" LED of
the CPU module turns off during operation of the PLC.
Figure 12.4 Flowchart for when the "RUN" LED turns off
YES
NO
The "RUN" LED has turned off.
Completed
Does the "RUN" LED
turn on?
How
is the "POWER"
LED of the power supply
module?
Is the "ERR." LED
on/flashing?
Off
On
Section 12.2.3 Flowchart for when
the "POWER" LED turns off
Section 12.2.7 Flowchart for when
the "ERR." LED is on/flashing
YES
YES
NO
Reset the CPU module
RUN/STOP/RESET switch.
Set the CPU module
RUN/STOP/RESET switch to STOP.
Write END to sequence step 0 with
GX Developer.
Set the CPU module
RUN/STOP/RESET switch to RUN.
Is the
operation monitored
by GX Developer
possible?
Possible cause is a sequence
program error.
Check the program and modify
the program error location.
Has
measures been
taken against noise?
Take measures against noise.
Possible cause is a PLC part
fault/poor connection.
Please consult your local Mitsubishi
service center of representative,
explaining a detailed description of
the problem.
NO
YES
NO
Replace the CPU module.
Section 12.2.7
Section 12.2.3

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)