Mitsubishi MELSEC User Manual

12
TROUBLESHOOTING
12.2 Troubleshooting Flowchart
12.2.11 Flowchart for when a program cannot be written
12 - 17
9
EMC AND LOW VOLTAGE DIRECTIVES
10
LOADING AND INSTALLATION
11
MAINTENANCE AND INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
12.2.11 Flowchart for when a program cannot be written
The following shows the flowchart for when programs cannot be written in the CPU
module.
* 1: If the password registration cannot be canceled due to the loss of
password, initialize the PLC memory with GX developer.
The PLC memory initialization initializes the memory of the CPU
module (i.e. deletes all information in the CPU module) and resets
the memory to the factory default.
GX Developer Operating Manual (Safety PLC)
Figure 12.7 Flowchart for when a program cannot be written
NO
YES
NO
NO
YES
YES
YES
YES
A program cannot be written to the CPU
Completed
Can a program be
written?
Has the password
registered?
Format program memory.
Cancel the password using GX
Developer. *1
Perform the following.
Organize files.
Confirm memory space.
Confirm the writing destination.
Can a program be
written?
Can a program be
written?
Can the program be
written?
NO
Hardware error
Please consult your local Mitsubishi
service center of representative,
explaining a detailed description of
the problem.
NO
NO
Turn on power supply again and
initialize the PLC memory. Register
the CPU access password.

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)