YOKOGAWA FA-M3 Vitesse Manuale operativo

1. Introduction

Technical

Information

TI 34M06Z43-01E

FA-M3 Maintenance Guide

Basic Troubleshooting (for F3SP7□)

TI 34M06Z43-01E

2018.01 1st Edition (YK))

Yokogawa Electric Corporation

www.yokogawa.com/itc/

TI 34M06Z43-01E

1. Introduction

1.1 Introduction

When a sequence CPU module error happens, you can determine its source to some extent by

checking the LED indicators located on the module front and the system log.

Perform the checks described in this document to get vital information, which can help to identify

the source of the error. The error code so obtained can be checked against the error code table

given in Chapter 8, “RAS Functions" of Part A of "Sequence CPU Instruction Manual –

Functions (for F3SP71-4N/4S, F3SP76-7N/7S) " (IM34M06P15-01E) for error cause analysis.

For remedial measures, refer to the user manuals of individual modules concerned.

1.2 Basic Operation of Self-Diagnosis

The sequence CPU module performs self-diagnosis including memory, processor, and ladder

instruction execution checks at power-on and during program execution.

When self-diagnosis detects an error, error-time actions are taken automatically according to the

severity of the error and the LED indicators are updated to reflect the CPU status.

1.3 Basic Checks

To identify the cause of an error, check the following items:

•the LED indicators located on the module front

•the system log of the sequence CPU

•the special registers and special relays

•the relays and registers of advanced function modules

TI 34M06Z43-01E

2. Checking LEDs

2.1 Checking LEDs

The LEDs located on the module front indicate the health condition of the sequence CPU. The

displayed information of the available LEDs are described in the figure below.

SD ●

EXE ●

US1 ●

US2 ●

RDY

RUN

ALM

ERR

SP76-7S CPU

MODE

SET

■ Sequence processing status indicators

RDY: Lit when the CPU is powered, ready and

operating normally.

RUN: Lit when a program is running.

ALM: Indicates a minor failure when lit. Program

execution can continue.

ERR: Indicates a moderate failure when lit. Program

execution can neither begin nor continue.

The power supply module outputs a FAIL

signal.

All LEDs are off: Major failure or power is off.

■ SD card access indicators

Indicates the status of the SD/SDHC memory card

and the execution status of the smart access function.

■ User LEDs

These are user-controllable LED indicators.

■ MODE switch value indicator

Indicates the position of the MODE

rotary switch.

TI 34M06Z43-01E

2.2 LED Display and Failure Modes

Failure modes (errors) are classified into three levels of severity: major failure, moderate failure

and minor failure.

Severity of Failures and LED Display

Severity

LED Display

Program

execution

Failure Mode (Error)

Major

failure

RDY off

Stops

•CPU error

•Memory error

Moderate

failure

RDY lit

RUN off

ERR Lit

Stops

•Program error

•I/O comparison error *1

•I/O module error *1

•Memory error

•CPU error

•Instruction error *1

•Scan timeout *1

•Startup error

•Invalid instruction found

•Too many I/O points

•Subroutine error *1

•Interrupt error *1

•Subunit communication error*1

•Sensor CB scan timeout*1

•Battery error

Minor

failure

RDY Lit

RUN Lit

ALM Lit

Runs

•Momentary power failure

•Inter-CPU communication error

•Subunit transmitter switching has occurred

•FA link error

*1: This failure mode can be defined as a minor failure or a moderate failure in the configuration.

TI 34M06Z43-01E

3. Checking System Log

3.1 What is System Log

The FA-M3 logs events, such as errors (ERR/ALM) and power-on events, along with time

information in the CPU. By checking this system log, you can trace the details and time of

occurrence of detected errors.

You can check the system log:

•using the FA-M3 Programming Tool WideField3 or

•using the SD card

3.2 Checking System Log Using FA-M3 Programming Tool WideField3

WideField3 window (online)

②The System Log window

is displayed.

③Check the error information:

Date & time of occurrence: 2018/01/16 15:28:58

Error message: I/O comparison error

Location of error: Block named “BLK_MAIN”

Instruction number “00190N”

①Click [System Log].

You can also monitor the

LED indicators from the

WideField3 window.

TI 34M06Z43-01E

3.3 Checking System Log using SD Card

System information can be retrieved using the SD card and MODE switch function. This allows

you to check the system log even if the FA-M3 Programming Tool WideField3 is not available.

Switch

value

Switch

Operation

Function

0 to 3

Press & hold

Resets the CPU

Press

Switches operating mode

Press

Unmounts the SD card

Press

Clears all alarms

Press

Saves project

Press

Gets module information

Press

Loads project

Press

Copies RAMDISK

Press & hold

Formats SD card

Press

Copies SD card data to

RAMDISK

Press & hold

Restores factory settings

SD ●

EXE ●

US1

US2

RDY

RUN

ALM

ERR

SP76-7S CPU

MODE

SET

（CARD1）

①

②

③

Log file retrieved using SD card

■ System Maintenance Using MODE Switch

Besides retrieving log information, the MODE

switch (+ SD card) provides convenient functions

for switching between operating modes, loading

and saving programs, etc. so you can maintain an

FA-M3 system even without a personal computer!

Tech Tip

■Procedure

①Mount the SD card.

②Set the MODE switch to position 7.

The MODE switch LED displays the

value “4, 2, 1”

③Press and release the SET button within

one second.

④The system log is saved in the top-level

INFO folder on the SD card.

⑤Open and read the file on a PC.

TI 34M06Z43-01E

4. Checking Special Registers and Special Relays

4.1 What are Special Registers and Special Relays?

Special registers and specials relays are registers and relays that have specific functions relating

to, say, the internal state and errors of the FA-M3. When an error is detected and logged in the

system log, the self-diagnosis result may also be saved in special registers (Z) in the sequence

CPU module.

In addition, a special relay (M) corresponding to the error is set. This special relay may be

checked in a ladder program for error detection purposes. Refer to the following table for

mapping error messages to special registers and special relays.

Mapping Failures to Special Registers and Special Relays

Severity of

Failure

Failure Classification

LED

Indicators

Special Relay

that Turns On

Special

Registers

Storing Error

Code

Major failure

System error

All LEDs are

off.

－

Moderate

failure

Self-diagnosis

error

Startup error

ERR is lit

M193

Z017 to Z019

Boot mode error

SPU error

memory error

Invalid instruction

found

Program error

Battery error or memory check

pattern error

M194

－

Moderate

failure or

minor failure

(user-defined)

Instruction

processing

error

Subroutine error

ERR is lit if

defined as

moderate

failure;

ALM is lit if

defined as

minor failure

M201

Z022 to Z024

Interrupt error

Instruction error

Macro instruction

error

I/O comparison error

M202

Z027 to Z029

I/O module error

M203

Z033 to Z040

Scan timeout

M204

－

Sensor CB scan timeout

M212

－

Subunit communication error

M210

Z089 to Z096

Minor failure

Momentary power failure

ALM is lit

M195

－

Inter-CPU communication error

M196

－

Subunit transmitter switching has

occurred

M211

Z089 to Z096

FA link (1 to 8) error

M0273-M0368

M0369-M0480

M8321-M8432

M8433-M8544

M8545-M8656

M8657-M8768

M8769-M8880

M8881-M8992

－

TI 34M06Z43-01E

4.2 How to Check Special Registers and Special Relays

You can check special registers and special relays using the FA-M3 Programming Tool WideField3,

either from the Common Tag Definition Monitor, or the Device Monitor. The following figure shows

example screen captures when an instruction processing error is detected.

How to Check Special Relays and Special Registers

Device Monitor: Special Relays

Device Monitor: Special Registers

Common tag Definition Monitor

■ Registered Device Monitor

If you know the devices to be monitored

beforehand, .pre-register them using the

Registered Device Monitor to save the

effort of searching for them every time and

thus improve efficiency!

Pre-register devices to be monitored.

Tech Tip

TI 34M06Z43-01E

4.3 How to Check Other Devices

Besides special relays and registers, other devices can be monitored similarly.

How to Check Device Data

The procedure is similar for special relay and

special register.

Click the device type to be monitored.

Tech Tip

■Balloon comments and monitors

Is it tedious to open the monitor window

repeatedly when monitoring a device? For a

fixed device, you can place a device monitor

on a ladder program like a post-it note. This

is especially handy for monitoring device

data changes in tandem with program

execution.

Place device monitors on a

ladder program like post-it notes.

You can use balloons as written memos too.

TI 34M06Z43-01E

5. Advanced Function Module Monitor

5.1 What is Advanced Function Module Monitor

Advanced function modules such as temperature control and PID modules and positioning

modules have a self-diagnosis function, which stores error information in the module’s own

registers or relays when it detects an error.

The Advanced Function Module Monitor directly monitors the registers and relays of such

advanced function modules. With this convenience function, there is no need to write programs

that read register and relay data for monitoring purposes only.

5.2 How to Check Advanced Function Module Registers

In the online window of the FA-M3 Programming Tool WideField3, right-click the module to be

monitored from the module list displayed on the left side of the window and select either the

Advanced Function Module Register Monitor or the I/O Relay Monitor*. You can now monitor

registers and relays of the selected module.

* A module with the I/O Relay Monitor option displayed as grayed-out has no relay.

Internal registers of F3AD08

Module list

How to Check Using Advanced Function Module Monitor

(Example showing Register Monitor for F3AD08/F3HA12)

Internal registers of F3HA12

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