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FUNCTIONS

6.7 Self-diagnostics Function

6 - 29

Overview

Performance

Specification

Sequence Program

Configuration and

Execution Conditions

I/O Nunber Assignment

Memories and Files

Handled by CPU Module

Functions

Communication with

Intelligent Function

Module

Parameters

(6) Self-diagnostics list

Here is a list of the self-diagnostics executed by the CPU module.

The error messages in the "Error message" column in Table6.11 can be checked

using GX Developer [Diagnostics] [PLC Diagnostics].

(Continued to the next page)

Table6.11 Self-diagnostics list

No.

Detailed item/

Diagnostics subject

Diagnostics description

Diagnostics

timing

Error occurring when error is detected

Error code Error message

1 RAM diagnostics Is the CPU module internal memory destroyed?

When power-on

When reset

canceled

1131,1132,1133,

1136,1137

RAM ERROR

Always

1141,1142,1143,

1146

2 F/W diagnostics Is F/W stored in ROM corrupted?

When power-on

When reset

canceled

When an END

instruction executed

8060 INCORRECT FIRMWARE

Operation circuit

diagnostics

Are the operation circuits for sequential

processing in the CPU module working

correctly?

When power-on

When reset

canceled

When an END

instruction executed

1210 OPERATION CIRCUIT ERROR

4 Program verify

Are any files stored in program memory

corrupted?

When power-on

When reset

canceled

8031

INCORRECT FILE

When an END

instruction executed

8032

5 Output data verify

Do the operation results that are output from

CPUs A/B match?

When an END

instruction executed

8050

SAFETY OUTPUT VERIFY

ERROR

6 Time monitoring

Do CPUs A/B have the same OS execution

state?

Always 8020

CPU A & B CAN'T BE

SYNCHRONIZED

When an END

instruction executed

8021

7 Microcomputer diagnostics

Are the registers used with the CPU module

working correctly?

When power-on

When reset

canceled

When an END

instruction executed

8000

INTERNAL REGISTER

ERROR

8010 INTERNAL BUS ERROR

Power supply voltage

monitoring

Is the safety CPU module operating at a voltage

within the range for which operation is assured?

Always 8080 POWER SUPPLY ERROR

Power supply voltage

monitoring circuit

diagnostics

Are the circuits that monitor the power supply

voltage working correctly?

When an END

instruction executed

8090

VOLTAGE DIAGNOSIS

ERROR

10 Clock stop detection

Is input clock to the CPU module internal circuit

stopped?

Always 8120 WDT CLOCK CHECK ERROR

11 CPU module OS

Check that the main CPU is not going out of

control but is operating normally.

Always 1000, 1006 MAIN CPU DOWN

12 CPU module hardware

Is the hardware below for the CPU module

working correctly?

• Main CPU

• Clock element

• RUN/STOP/RESET switch

Always

1001, 1002,

1003, 1004

MAIN CPU DOWN

13 Power supply module Has the power supply module failed? Always 1009 MAIN CPU DOWN

14 Program

Was the END instruction executed at the end of

the user program?

When an END

instruction executed

1010 END NOT EXECUTE

CPU module, base unit,

CC-Link Safety master

module, MELSECNET/H

module

Was an invalid interrupt generated within the

CC-Link Safety master module, MELSECNET/

H module, base unit, or CPU module?

During interrupt 1311 I/O INTERRUPT ERROR

Module state during

operation

Are the CC-Link Safety master module and

MELSECNET/H module operating normally?

When power-on

When reset

canceled

1401

INTELLIGENT FUNCTION

MODULE DOWN

When an END

instruction executed

1403

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 233 234

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