Mitsubishi L02CPU User Manual

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CHAPTER 3 CPU MODULE FUNCTIONS
3
3.11 File Password 32 3.11.1 Setting file passwords
3.11 File Password 32
A read password and write password can be set to each file that is stored in the CPU module. By using this function,
files can be protected against tampering and theft by unauthorized persons.
3.11.1 Setting file passwords
(1) Characters applicable to passwords
A read password and write password can be set individually. Alternatively, one same password can be specified
for both read write passwords.
• Applicable characters: ASCII characters (numbers, alphabets
*1
, special characters
*2
)
• Number of characters applicable: 4 to 32 characters
*1 Alphabets are case-sensitive.
*2 Special characters are the following: ` ~ ! @ # $ % ^ & * ( ) _ + - = { } | \ : " ; ' < > ? , . / [ ], and spaces.
(2) Timing for file protection to be enabled/disabled
Files are protected immediately after registration of a password, and file protection is disabled immediately after
deletion of the password.
(3) Files that can be password-protected
The following files can be protected by a password.
(4) Online operations that require password authentication
Password authentication is required for the following operations whenever the file is password-protected.
( Page 102, Section 3.11.2)
• Program • Parameter • Initial device value
• Device comment • Source information
• Write to PLC (data writing) • Read from PLC (data reading)
• Online change (ladder mode) (data writing) • Online change (files) (data writing)
• Change T/C setting (data writing) • Verify with PLC (data reading)
• Create/Change or Delete of a password (data
reading and writing)
• Delete PLC Data (data writing)
Read password
"XYZ98756" is authenticated.
Programming tool
File A can be read since
the password matches.
CPU module
File A
Write password: AbcDEF12
Read password: XYZ98756
A write password and read
password can be set individually.
File A cannot be written since
the password does not match.
Programming tool
Write password
"1234abCD" is authenticated.

Mitsubishi L02CPU Specifications

General

Brand	Mitsubishi
Model	L02CPU
Category	Controller
Language	English

Summary

MITSUBISHI MELSEC-L CPU Module User's Manual

SAFETY PRECAUTIONS

Design Precautions

Essential safety guidelines for designing systems with the controller, covering circuits and operations.

Installation Precautions

Crucial steps for safely installing the programmable controller modules, including environment and interconnection.

Wiring Precautions

Important safety measures for correctly wiring the controller, covering grounding, terminals, and cable routing.

Startup and Maintenance Precautions

Precautions for safe startup, operation, and maintenance procedures, including handling batteries and static electricity.

PART 1 PROGRAMMING

CHAPTER 1 BASIC PROCEDURE FOR PROGRAMMING

Guides through the fundamental steps of PLC programming.

CHAPTER 1 BASIC PROCEDURE FOR PROGRAMMING

1.2 Creating a Project

1.3 Creating a Program

Explains the fundamental steps and prerequisites for program creation.

1.4 Converting a Program

1.5 Writing a Project to the CPU Module

Describes how to transfer the project, including memory formatting.

1.6 Checking an Operation of the CPU Module

Outlines procedures for verifying the CPU module's operation after programming.

CHAPTER 3 CPU MODULE FUNCTIONS

3.2 Constant Scan

3.3 Watchdog Timer (WDT)

Details the watchdog timer for detecting hardware failures and program errors.

3.4 Latch Function

3.5 Initial Device Value

3.11 File Password 32

Explains how to protect files stored in the CPU module with passwords.

3.13 Remote Operation

Details methods for controlling CPU module operations remotely.

3.17 Local Device Monitor/Test

3.19 Executional Conditioned Device Test

3.20 Sampling Trace

3.21 Writing Programs in RUN Status

Describes online program changes while the CPU module is running.

3.23 Self-Diagnostic Function

Covers the CPU module's self-diagnostic capabilities for error detection.

3.24 Error Clear

Explains how to clear detected continuation errors by type.

3.27 Latch Data Backup to Standard ROM

3.30 CPU Module Change Function with SD Memory Card

Explains data backup and restoration using an SD memory card for module replacement.

Appendix 1 Parameter Setting

Appendix 1.2 PLC Parameter

Details various PLC parameter settings including name, system, file, RAS, boot, and program.

Appendix 1.4 Remote Password setting

Provides screens and details for setting remote passwords for access control.

Appendix 1.2 PLC Parameter

2. PLC System Setting

Configures system-level parameters for CPU module operation.

3. PLC File Setting

4. PLC RAS Setting

Configures Reliability, Availability, and Serviceability (RAS) functions.

5. Boot File Setting

6. Program Setting

8. Device Setting

9. I/O Assignment Setting

Configures the connecting status and assignments of modules in the system.

11. Built-in Ethernet Port Setting

12. Built-in I/O Function Setting