Mitsubishi L02CPU User Manual

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CHAPTER 2 APPLICATION OF PROGRAMMING
2
2.1 Memories and Files 2.1.2 Parameter-valid drive
2.1.2 Parameter-valid drive
CPU modules operate according to parameter settings. Systems automatically select parameters from those stored in
the drives for CPU module operation, according to the following priority order.
If parameters are set to be booted to an SD memory card, the above priority order is applied after the parameters are booted
to the specified destination. (
Page 71, Section 2.9)
(1) Timing that the parameters take effect
The CPU module automatically searches for parameters in the following timing and operates according to the
parameters stored in the drive.
• When the CPU module is powered off and then on
• When the CPU module is reset
(2) Precautions
Note that if the parameters are written while the CPU module is in operation, the timing that the parameters take
effect varies.
(a) To write a parameter to the drive other than the one in operation:
The CPU module keeps operating according to the current parameters. When the CPU module is turned off
and then on or is reset, newly written parameters take effect according to the priority order.
(b) To write a parameter to the drive where another parameter is currently processed:
Only the device settings become effective immediately after writing is complete. To make all the parameters
effective, power off and then on or reset the CPU module.
[Priority order] 1) Drive 0 (program memory)
2) Drive 2 (SD memory card)
3) Drive 4 (standard ROM)

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