Mitsubishi L02CPU User Manual

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CHAPTER 7 CONVENIENT USAGE OF DEVICES
7
7.2 Local Device
(3) Local devices when executing a subroutine program
When executing a subroutine program, the local device in the file where the subroutine program is stored can be
used by ON/OFF of SM776.
(a) When SM776 is off
(b) When SM776 is on
(c) Precautions
• When SM776 is on, local device data area read out when a subroutine program is called, and the data are
saved after execution of the RET instruction. Because of this, the scan time is increased if one subroutine
program is executed with SM776 set to on.
• The on/off status of SM776 is set for each CPU module. It cannot be set for each file.
• If the on/off status of SM776 is changed during program execution, control is implemented according to
the information after the change.
SM776 Operation
OFF Perform operations with the local device that corresponds to the source file of the subroutine program.
ON Perform operations with the local device that corresponds to the file where the subroutine program is stored.
Local device area
for file name, ABC
Local device area
for file name, DEF
Execution of subroutine
program
Local device
writing/reading
File name: DEF
(Standby type program)
File name: ABC
Subroutine program
Local device area
for file name, ABC
Local device area
for file name, DEF
Execution of subroutine
program
Local device
writing/reading
File name: DEF
(Standby type program)
File name: ABC
Subroutine program

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