Mitsubishi Electric GX Developer Version 6 Operating Manual v2

(MELSAP-L)

SW6D5C-GPPW-E

Operating Manual

A - 1 A - 1

SAFETY INSTRUCTIONS (Always read these instructions before using this equipment.)

Before using this product, please read this manual and the relevant manuals introduced in this manual

carefully and pay full attention to safety to handle the product correctly.

The instructions given in this manual are concerned with this product. For the safety instructions of the

programmable controller system, please read the CPU module user's manual.

In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".

! DANGER

CAUTION!

Indicates that incorrect handling may cause hazardous conditions, resulting in death or severe injury.

Indicates that incorrect handling may cause hazardous conditions, resulting in medium or slight personal injury or physical damage.

Note that the ! CAUTION level may lead to a serious consequence according to the circumstances.

Always follow the instructions of both levels because they are important to personal safety.

Please save this manual to make it accessible when required and always forward it to the end user.

[Design Instructions]

! DANGER

When data change, program change or status control is to be made from a personal computer

to the running PLC, configure up an interlock circuit in the outside of the PLC system to ensure

that the whole system will always operate safely.

Also, determine corrective actions to be taken for the system when a communication error

occurs due to a cable connection fault or the like in online operation performed from the

personal computer to the PLC CPU.

! CAUTION

Online operation performed with a personal computer connected to the running CPU module

(especially program change, forced output or operating status change) should be started after

carefully reading the manual and fully ensuring safety.

Not doing so can cause machine damage or accident due to miss operation.

A - 2 A - 2

REVISIONS The manual number is given on the bottom left of the back cover.

Print Date Manual Number Revision Sep.,2000 SH(NA)-080100-A First edition

This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual.

2000 MITSUBISHI ELECTRIC CORPORATION

A - 3 A - 3

INTRODUCTION

Thank you for choosing the Mitsubishi MELSOFT series Integrated FA Software. Before using the equipment, please read this manual carefully to use the product to its optimum. A copy of this manual should be forwarded to the end user.

CONTENTS

SAFETY INSTRUCTIONS............................................................................................................................A - 1

REVISIONS...................................................................................................................................................A - 2

CONTENTS...................................................................................................................................................A - 3

About Manuals ..............................................................................................................................................A - 5

Abbreviations and Generic Names Used in This Manual............................................................................A - 6

1. OVERVIEW 1 - 1 to 1 - 2

1.1 Features ................................................................................................................................................... 1- 2

2. MELSAP-L FORMAT PROGRAMS 2 - 1 to 2 - 7

2.1 MELSAP-L Format SFC Diagrams ........................................................................................................ 2 - 1

2.2 Operation Output Instructions................................................................................................................. 2 - 2

2.3 Instructions for Transition Conditions ..................................................................................................... 2 - 3

2.4 Precautions to Observe When Creating Programs ............................................................................... 2 - 5

3. MELSAP-L PROGRAM EDITING METHOD 3 - 1 to 3 - 52

3.1 MELSAP-L Program Editing Outline Procedure .................................................................................... 3 - 1

3.2 List of SFC Diagram Symbols ................................................................................................................ 3 - 3

3.3 Basic SFC Diagram Editing Screen ....................................................................................................... 3 - 5

3.4 Creating/Modifying the SFC Diagram .................................................................................................... 3 - 7

3.4.1 Writing an SFC diagram................................................................................................................... 3 - 7

3.4.2 Deleting the SFC diagram................................................................................................................ 3 -19

3.4.3 Changing the step attribute.............................................................................................................. 3 -20

3.4.4 Cutting/Copying and pasting the SFC diagram............................................................................... 3 -21

3.4.5 Sorting the SFC diagram ................................................................................................................. 3 -24

3.4.6 Redisplaying the SFC diagram........................................................................................................ 3 -25

3.5 Creating Operation Outputs and Transition Conditions......................................................................... 3 -26

3.6 Comment Creation Method..................................................................................................................... 3 -27

3.6.1 Method of creating an SFC comment.............................................................................................. 3 -27

3.6.2 Method of creating a device comment ............................................................................................ 3 -29

3.7 Setting the Block Information.................................................................................................................. 3 -30

3.8 Displaying the Block List ......................................................................................................................... 3 -31

3.9 SFC-Related Parameter Settings........................................................................................................... 3 -32

3.9.1 SFC setting in PLC parameters....................................................................................................... 3 -32

3.9.2 Setting the block parameters ........................................................................................................... 3 -33

3.9.3 SFC program setting ........................................................................................................................ 3 -34

3.10 Conversion Operation........................................................................................................................... 3 -35

A - 4 A - 4

3.11 Instructions for Online SFC Program Writing....................................................................................... 3 -35

3.12 Search and Replacement ..................................................................................................................... 3 -36

3.12.1 Searching for a device ................................................................................................................... 3 -36

3.12.2 Searching for an instruction ........................................................................................................... 3 -37

3.12.3 Searching for a character string..................................................................................................... 3 -38

3.12.4 Searching for the Step No./Block No............................................................................................. 3 -38

3.12.5 Replacing the devices.................................................................................................................... 3 -39

3.12.6 Replacing the instructions.............................................................................................................. 3 -41

3.12.7 Replacing the open/close contacts................................................................................................ 3 -43

3.12.8 Replacing a character string .......................................................................................................... 3 -44

3.12.9 Replacing the Step No. .................................................................................................................. 3 -45

3.12.10 Listing contacts/coils used ........................................................................................................... 3 -46

3.12.11 Searching for the device use status ............................................................................................ 3 -46

3.12.12 Changing the T/C set values ....................................................................................................... 3 -46

3.13 Providing Displays................................................................................................................................. 3 -47

3.13.1 Displaying programs ...................................................................................................................... 3 -47

3.13.2 Displaying the step/transition comments....................................................................................... 3 -48

3.13.3 Displaying a label in the SFC diagram .......................................................................................... 3 -49

3.13.4 Displaying a program in the MELSAP3 format ............................................................................. 3 -50

3.14 Setting the SFC Diagram Display......................................................................................................... 3 -51

3.14.1 Setting the SFC diagram display ................................................................................................... 3 -51

3.14.2 Setting the SFC setting options ..................................................................................................... 3 -52

4. MONITORING AND TEST FUNCTIONS 4 - 1 to 4 - 7

4.1 SFC Diagram Monitor ............................................................................................................................. 4 - 1

4.2 Transition Watchdog Monitor.................................................................................................................. 4 - 4

4.3 All Block Batch Monitor and Active Step Monitor................................................................................... 4 - 5

4.4 Block List Monitor.................................................................................................................................... 4 - 6

4.5 Device Test ............................................................................................................................................. 4 - 7

5. PRINTING SFC DIAGRAMS 5 - 1 to 5 - 7

5.1 SFC Diagram Print Setting ..................................................................................................................... 5 - 1

5.2 SFC Diagram Printing Examples............................................................................................................ 5 - 2

INDEX Index - 1

A - 5 A - 5

About Manuals

The following manuals are also related to this product.

In necessary, order them by quoting the details in the tables below.

Related Manuals

Manual Name Manual Number (Model Code)

GX Developer Version 6 GX Simulator Version 5 Operating Manual (Start-up)

Describes the system configuration, installation method and starting method of SW6D5C -GPPW-E and

SW5D5C -LLT-E.

IB-0800132 (13J988)

GX Developer Version 6 Operating Manual

Explains the functions of the programming, printout, monitoring and debugging methods and so on

SW6D5C -GPPW-E.

SH-080098 (13J989)

GX Developer Version 6 Operating Manual (SFC)

Describes the method of creating SFC programs using the MELSAP-II format and the MELSAP3 format

of the SW6D5C-GPPW-E, and also the method of printing them, monitoring them, and debugging them.

SH-080099 (13J990)

QCPU (Q mode) Programming Manual (MELSAP-L)

Describes the necessary programming method, specifications and functions for creating programs using

the MELSAP-L format.

SH-080076 (13JF61)

A - 6 A - 6

Abbreviations and Generic Names Used in This Manual

This manual uses the abbreviations and terms listed in the following table to discuss

the GPP Function Software Package and PLC module. In addition, the following

table lists the names of modules whose names must be indicated explicitly.

Abbreviation/Generic term Description/Target module

MELSAP-L Abbreviation for an SFC function in the MELSAP-L format

MELSAP-II/3 Generic term for an SFC function in the MELSAP-II or MELSAP3 format

SFC program Generic term for a program in the MELSAP-L, MELSAP-II or MELSAP3 format

QCPU (Q mode) Generic term for Q02(H), Q06H and Q25H

QCPU (A mode) Generic term for Q02(H)-A and Q06H-A

Described as ACPU in the main text.

QnACPU Generic term for PLC availabel with MELSEC-QnA

ACPU

Generic term for PLC available with MELSEC-A

Including MOTION (SCPU)

(However, GPPW does not support A1, A2, A3, AH3, A3M, A52G, A73, A0J2 and A3V. )

FXCPU Generic term for PLC availabel with MELSEC-F

GX Developer Generic product name for SWnD5C-GPPW, SWnD5C-GPPW-A, SWnD5C-GPPW-V and

SWnD5C-GPPW-VA product types. (n means any of versions 0 to 6)

GPPQ Abbreviation for an SW IVD-GPPQ or SW NX-GPPQ format software package

GPPA Abbreviation for an SW SRXV-GPPA, SW NX-GPPA or SW IVD-GPPA format

software package

Software package for motion

controller

Generic name for software packages for the motion controller which allow SFC programs

to be edited

1 - 1 1 - 1

MELSOFT 1 OVERVIEW

1. OVERVIEW

This manual describes the editing and monitoring operations of the MELSAP-L format

SFC functions (hereafter abbreviated to MELSAP-L), which are included in the

functions of GX Developer (unless otherwise specified, the product GX Developer

herein is its English version 6.)

For a description of functions other than MELSAP-L, and also the specifications of

SFC programs, please refer to the relevant manuals indicated in "Related Manuals".

SFC means Sequential Function Chart.

MELSAP-L is a description format which is intended to promote efficiency of sequence

program development and also to making program a part.

The machine control section can be created as a part by describing the flow of

operation and the control of the machine separately, that is, by describing the

operation sequence of the machine using MELSAP-L, and the control of the machine

including the various interlocks using a sequence program (circuit/list).

The system is designed in such a way that output conditions, such as interlocks,

cannot be described at the steps in MELSAP-L. This permits prompt rectification of

trouble that occurs if an output fails to appear at a step despite the activation of the

step.

(1) Creation using MELSAP-L + sequence program

(a) MELSAP-L side

By creating an SFC program that is related to the

interlock conditions, the flow of operation is easy to

understand.

(b) Sequence program side

By creating conditions regardless of the flow of

operation, it can be created as a part.

aX0 Start oM70 Ascent

aX1 Upper limit

oM80 Descent

aX2 Lower limit

Machine operation sequence

Y10

Y11

Ascent Descent Upper limit

Emerge- ncy stop

Descent

Ascent Can be created as a part

Control of machine

Describe steps and complicated interlock conditions using a ladder.

Step

AscentDescent Lower limit

Emerge- ncy stop

1

1 - 2 1 - 2

MELSOFT 1 OVERVIEW

(2) Description format in MELSAP-L

MELSAP-L display window The description format inside the steps and transition

conditions of MELSAP-L are as follows.

T0 K30

DM0V K10 W0

oT0 K30

X0

X1

C0 X1

M0 C0

T0

aX0

bX1

aC0&bX1

(aM0 bT0)&aC0

DMOV K10 W0

oM0 M0

Transition conditions

Step

You cannot describe contact-equivalent instructions

inside steps.

The PLC types that are compatible with MELSAP-L in the GX Developer are as

follows.

QCPU (Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU)

You cannot select MELSAP-L when the project PLC type is ACPU, QnACPU, QCPU-

A, FXCPU or a motion controller.

If the PLC type is changed to one other than QCPU, the MELSAP-II or MELSAP3

format is used.

1.1 Features

The features of MELSAP-L are described below.

(1) The operation sequence and ON/OFF status of devices can be monitored on the

same screen.

SFC diagram monitoring employs automatic scrolling, enabling the operation

sequence and configuration at each step to be readily grasped.

In addition, programs (instructions) can be described directly on an SFC diagram,

permitting the ON/OFF status of a contact and coil with two or more operation

outputs and transition conditions to be monitored on the same screen.

(2) Highly operable editing functions

Editing by means of programming, cut & copy & paste can be done using the

function keys, tool buttons, menu bars, and so on.

SFC diagram editing can also be done for other projects, programs and blocks.

(Cut & copy & paste is intended for use between MELSAP-L programs.)

(3) The display format can be changed over according to the particular situation.

The display format of a MELSAP-L format program can changed over to the

MELSAP3 format by the GX Developer display menu.

If you wish to display the transition conditions and operation outputs as a ladder,

display them in the MELSAP3 format.

1

2 - 1 2 - 1

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

2. MELSAP-L FORMAT PROGRAMS

This section describes SFC programs in the MELSAP-L format.

2.1 MELSAP-L Format SFC Diagrams

In an SFC program created in the MELSAP-L format, each operation unit in a series of

operations of the machine is expressed as one step, and instructions such as contacts

and coils that perform actual control are set at each step.

In MELSAP3, the SFC diagram is divided into an SFC diagram that indicates the

operation sequence, and a Zoom diagram that indicates detailed control for each

transition condition. In MELSAP-L, on the other hand, control instructions are directly

described and indicated on an SFC diagram.

MELSAP-L MELSAP-3

SFC diagram only Divided into an SFC diagram and a Zoom diagram (circuit)

MELSAP-L is a simple display format that does not display notes, device comments or

contacts to the operation outputs (contact-equivalent instructions).

Device comments can be set in this format.

If you use the MELSAP-L format to display an SFC program that contains notes and

contacts to the operation outputs (contact-equivalent instructions) that were edited in

the MELSAP3 format, "???.." will be displayed.

For details of the "???.." indication, refer to section 2.4.

2

2 - 2 2 - 2

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

2.2 Operation Output Instructions

(1) MELSAP-L format instructions

In MELSAP-L, operation output instructions are described in the following format.

Instruction Example of

MELSAP-L format

Example of list

format Example of circuit symbol

Output(o) oY70 OUT Y70 Y70

High speed timer (h) hT0 K100 OUTH T0 K100 T0 H K100

Set (s) sM100 SET M100 SET M100

Reset (r) rM200 RST M200 RST M200

Instructions other than the

above (o, h, s, r) are the

same as in the list format.

MOV K100 D0 MOV K100 D0 MOV K100 D0

To put a number of operation outputs in parallel inside the same step, partition each

output with a comma (,).

MELSAP-L format Circuit

oY70,sM100,MOV K100, D0

Y70

M100SET

D0MOV K100

(2) Instructions that cannot be described at operation outputs

The following instructions cannot be input to operation outputs in MELSAP-L.

NOP

MPS, MRD, MPP

Contact instruction

Comparison operation instruction (=, <, >, etc.)

For details, refer to the QCPU (Q mode) Programming Manual (MELSAP-L).

(3) Precautions to observe when describing operation outputs

Do not make an operation output for each instruction that does not require

execution conditions (DI, EI, etc.). Describe it at the end.

Example: oY70, MOV D0 D100, DI Correct

DI, oY70, MOV D0 D100 Incorrect

You can describe up to 24 instructions in one operation output.

2

2 - 3 2 - 3

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

2.3 Instructions for Transition Conditions

(1) MELSAP-L format instructions

In MELSAP-L, transition conditions are described in the following format.

Instruction Example of

MELSAP-L format

Example of list

format Example of circuit symbol

Open contacts (a) aX0 LD X0 X0

Close contacts (b) bX10 LDI X10 X10

Rise contacts (p) pM100 LDP M100 M100

Fall contacts (f) fM200 LDF M200 M200

Comparison operation

instruction (=, <. >, etc.) = D0 K100 LD = D0 K100 D0 K100

: For details of comparison operation instructions, refer to the QCPU (Q mode) /

QnACPU Programming Manual (Common Instructions).

To connect contact instructions in series (AND), separate each instruction using "&".

To connect contact instructions in parallel (OR), separate each instruction using " | ".

MELSAP-L format Circuit

aX0 & aX10 X10X0

aX0 | aX10 X10

X0

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MELSOFT 2 MELSAP-L FORMAT PROGRAMS

If "&" and " | " exist together, "&" will take priority.

In order to increase the priority, use "( )".

MELSAP-L format Circuit

aX0 | aM0 & aX1 M0

X0

X1

(aX0 | aM0) & aX1 M0

X0 X1

aX0 & aX1 | aM0 & aM1 M0

X0

M1

X1

aX0 & (aX1 | aM0) & aM1

X0

M0

X1 M1

(2) Instructions that cannot be described at transition conditions

All instructions with the exception of contact instructions and comparison

operation instructions

2 - 5 2 - 5

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

2.4 Precautions to Observe When Creating Programs

The precautions to observe when creating SFC programs using MELSAP-L are set out below. (1) When a program was made using MELSAP-L

(a) PLC types other than QCPU (Q mode) are not compatible with the MELSAP-L format.

(b) You can select ladder, MELSAP3 or MELSAP-L for each program. However, you cannot specify MELSAP3 or MELSAP-L in units of SFC program blocks.

(c) If a number of SFC programs (MELSAP-L format and MELSAP3 format) exist in the PLC CPU, only one program can be executed. (This does not apply to control STC programs.) If you wrote a number of SFC programs, set all but one of them in the standby program by means of a PLC parameter program setting.

(d) You cannot input a contact or contact-equivalent instruction to an operation output.

(e) The operation output/transition conditions per block can consist of up to 2k sequence steps. Each operation output or transition condition can consist of up to 512 sequence steps. When checking the number of sequence steps, display them in the MELSAP3 format.

(f) Each operation output/transition condition program can be displayed using up to 32 characters in the case of an SFC diagram. If the number of characters exceeds 32, "..." is displayed at the 32nd character position. If you place the mouse cursor in the program display column, up to 256 characters can be displayed. If 256 characters are exceeded, "..." appears at and after the 253rd character position. Note: Depending upon the resolution of the peripheral equipment (display), it

may not always be possible to display up to 256 characters.

(g) You cannot make notes.

(h) You cannot display device comments on an SFC diagram. Edit and display device comments in the device comment creation dialog box.

(i) If you change the PLC type to ACPU or QCPU (A mode), the MELSAP-II format will be activated.

(j) If you change the PLC type to QnACPU, the MELSAP3 format will be activated.

(k) If you attempt to make a project inquiry using a MELSAP-L format program as the inquiry source and a ladder program as the inquiry object, the inquiry will not take place. You can make an inquiry by using a ladder program as the inquiry source and a MELSAP-L format program as the inquiry object. You can make inquiries to both MELSAP-L and MELSAP3 format programs.

2 - 6 2 - 6

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

(2) If you use the MELSAP-L format to display a program created in the MELSAP3

format

If you display the following operation outputs and transition conditions in the

MELSAP-L format, "???.." will appear.

An operation output or transition condition containing a NOP instruction

An operation output containing a contact or contact-equivalent instruction

An operation output containing a note

If "???.." appears, change over to the MELSAP3 format, and check the circuit.

In the case of a circuit that exists in the MELSAP3 format, you cannot use the

MELSAP-L format to amend or monitor the program, however the CPU will perform

processing normally.

If you wish to amend or monitor a program in the MELSAP-L format after checking

it in the MELSAP3 format, delete the program displayed as "???.." in the SFC

symbol/program input window, then input it once again in the MELSAP-L format.

[Operation output created in the MELSAP3 format] X0

X1

Y20 X10

[Display in MELSAP-L format]

aX0

??? ..

aX1

An operation output containing a contact instruction created in the MELSAP3 format will appear as "???.." in the MELSAP-L format.

To amend or monitor a program in the MELSAP-L format, delete it then re-input it.

[Example of program in the MELSAP-L format]

The diagram below shows an example of the case in which the same program as a

MELSAP3 format program is created in the MELSAP-L format.

aX0

aX10

oY20

aX1

Jump to the dummy step.

Create a dummy step.

bx1 & bx10

2 - 7 2 - 7

MELSOFT 2 MELSAP-L FORMAT PROGRAMS

(3) Compatibility with GX Developer prior to GX Developer (SW4D5C-GPPW-E or

earlier)

(a) If you read a MELSAP-L format program using the GX Developer (SW4D5C-

GPPW-E), it will be displayed in the MELPAP3 format.

Once you overwrite and save the program with the GX Developer (SW4D5C-

GPPW-E), it will be displayed in the MELSAP-L format, even if you

subsequently read it with the GX Developer (SW5D5C-GPPW-E or later).

Once you change the PLC type into a type other than QCPU (Q mode) after

reading it to the GX Developer (SW4D5C-GPPW-E), it will not be displayed in

the MELSAP-L format, even if you subsequently read it with the GX Developer

(SW5D5C-GPPW-E or later).

(b) If you wish to use a MELSAP-L format program in the GX Developer(SW3D5C-

GPPW-E or later), first change the PLC type to ACPU or QnACPU then read

the program. (The program will be read in the MELSAP-II format or the

MELSAP3 format.)

3 - 1 3 - 1

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

3. MELSAP-L PROGRAM EDITING METHOD

3.1 MELSAP-L Program Editing Outline Procedure

1)

GX Developer

(To create new program)

Creation of new project

Set the PLC series, PLC type and project name, select the program format to "SFC", and check "MELSAP-L".

SFC parameter setting

Set the SFC program start mode, block 0 start condition, and output mode at block deactivation.

Other parameter settings

Set the other parameters as required.

SFC program setting

SFC option setting

Set the jump to the start destination block, and also set the automatic scroll monitor and the transition monitor.Set the reference window, a jump

Toolbar setting

Set the toolbar display for "SFC".

(To modify the existing program)

Block parameter setting

Set the "Periodic Execution Block No.", "Act at Block Multi-Activated" and "Act at Step Multi-Activated".

Open the project. 3

3 - 2 3 - 2

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

1)

Set the SFC display column.

(To create new program)

SFC write

Write SFC diagram from block 0.

SFC information register setting

To create another block

Save the project.

Write

Write the SFC diagrams and SFC comments to the specified block.

Display the specified block.

(To modify the existing program)

Read the block to be modified.

Write, insert, delete

SFC diagram modifying operationConversion operation

Step-by-step operation output/ transition condition correcting operation

SFC information register setting, modification

POINT

This outline procedure is given for your reference.

You can perform the operations in any order without following the above procedure.

3

3 - 3 3 - 3

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

3.2 List of SFC Diagram Symbols

Shown below is a list of symbols used in SFC programs. A block indicates a series of operations that start at the initial step and end at the end step. The minimum unit of operation is divided into a step and a transition. The operation output or transition condition is displayed using a MELSAP-L format instruction (program).

(1) List of MELSAP-L format SFC diagram symbols

Class Name SFC Diagram Symbol Quantity

Initial step 0

Dummy initial step 0

Coil hold initial step 0 SC

Operation hold step

(without transition check)

initial step

0 SE

Operation hold step

(with transition check)

initial step

0 ST

Reset initial step

A t s

te p

0

0 RSn

Any one of these steps in a block

The initial step at top left (first row) of

the SFC diagram is set to No.0

Initial step i

Dummy initial step i

Coil hold initial step i SC

Operation hold step

(without transition check)

initial step

i SE

Operation hold step

(with transition check)

initial step

i ST

Reset initial step

A t i

ni tia

l s te

p ot

he r

th an

s te

p 0

i RSn

Max 31 steps in one block

i = step number. (1 to 511)

Step i

Dummy step i

Coil hold step i SC

Operation hold step

(without transition check) i SE

Operation hold step

(with transition check) i ST

Reset step i RSn

Block start step (with

end check) i

Bm

Step

Block start step (without

end check)

O th

er th

an in

iti al

s te

p

i Bm

Including initial step, Max. 512 steps in one

block

i = Step number (1 to 511)

n = Reset destination step number

m = Start destination block number

3 - 4 3 - 4

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

Class Name SFC Diagram Symbol Quantity

Series transition a

Selective branch a b n

Selective branch-parallel

branch a b

Selective coupling a b

Selective coupling-parallel

branch

a b

Parallel branch a

Parallel coupling a

Parallel coupling-parallel

branch a

Parallel coupling-selective

branch a b

Parallel coupling-selective

coupling a

b

a, b = Transition condition number

Transition

Jump j

j a

a = Transition condition number

j = Jump destination number

Block end Block end More than one block end may be provided

in one block.

POINT If "?" is attached to the left side of the step number or transition condition number, it

means that the operation output/transition condition program is not set.

When you set the program, "?" is no longer displayed.

3 - 5 3 - 5

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

3.3 Basic SFC Diagram Editing Screen

(1) Overall configuration of screen

1) 2)

3)

7)

5)

6)

4)

1) Title bar

2) Menu bar

3) Tool bar

4) Project data list

5) MELSAP-L editing screen

6) Block list screen

7) Status bar

3 - 6 3 - 6

MELSOFT 3 MELSAP-L PROGRAM EDITING METHOD

(2) Configuration of MELSAP-L editing screen

Transition number

Start destination block number.

Step number

Label

SFC comment (step)

Operation output

SFC comment (transition)

Transition condition

Row number

Reset destination step number

Jump destination step number

Column number

POINT Perform the following operation to show the SFC chart in the specified block.

1. Move the cursor from [View] [Display block list] any display block position,

and press the [Enter] key.

2. Choose [View] [Display block list] any block position, and double-click that

position.

3. Choose [Find/Replace] [Find step no./block no.] any block No., and

specify it.

4. Press the space key on the block starting step in the SFC chart.

5. Move the cursor from [Window] data name, and press the [Enter] key.

6. Move the cursor from [Window] data name, and double-click it.

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3.4 Creating/Modifying the SFC Diagram

3.4.1 Writing an SFC diagram

An SFC diagram may be created in any of the following four methods.

1. Starting from the tool button on the toolbar 2. Starting from the function key 3. Starting from the menu on the toolbar

4. Starting from pressing the Enter key on the SFC diagram.

Performing any of the above operations shows the Enter SFC symbol, enter program window.

Enter data by the operations given on the pages that follow.

POINT The symbols that can be created in the SFC diagram are determined by the cursor position (line). The step created in the first line automatically becomes the initial step. You can create various kinds of steps or jumps in the 1(+multiple of 3) th line. You can create a series transition line, selective branch or a parallel coupling in the 2 (+multiple of 3) th line. You can create a parallel branch or a selective coupling in the 3 (+multiple of 3) th line. However, if you create a selective branch or a parallel coupling in the 2 (+multiple of 3) th line, a series transition will be created in the 3(+multiple of 3)th line. You can create "|" (vertical line) in any position other than the 1st line.

The 1st line automatically becomes the initial step.

" " prevents a transition (excluding a jump) from being created.

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(1) Operation method created from the tool button (a) Write (overwrite) operation example

1) Step ( / )

n Operation output step comment

Step number

Step attribute

OK Operation outputs

Diagram symbol "STEP" (DUMMY) appears. You can change the diagram symbol by clicking

Step number Numbers are automatically assigned in the input sequence (ascending order). If you wish to specify the step number, enter a number in the range 1 to 511. After creating an SFC diagram, you can re-assign numbers in sequence from top left to bottom right by sorting. When you input the operation output program to " " (dummy step), the display automatically switches to " " (step).

Step attribute When you wish to add a step attribute, click , then select the attribute.

If you select the reset step "[R]" using the step attribute, enter the reset destination step number

Comment You can enter up to 32 characters as a step comment. When you click [View] [Display comment of step and TR] from the menu bar, the comment appears in the SFC diagram.

Program Input the operation output coil and instruction. You can input a number of coils and instructions by partitioning then with commas (,). For details of instructions, refer to section 2.2. For details of the input method, refer to section 3.5.

RUN write button You can perform a "write during RUN" operation by clicking this button. For details of a "write during RUN" operation, refer to section 3.11.

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2) Block start step ( / )

n

Step comment

Start destination block number

OK

Step number

Bm

Diagram symbol

"BLOCK (BLOCK-S) appears. You can change the diagram symbol by clicking .

Step number

Numbers are automatically assigned in the input sequence (in ascending

order).

To specify a step number, enter a number in the range 1 to 511.

After creating an SFC diagram, you can assign numbers once again in

sequence from top left to bottom right by sorting.

Blocks

Enter the start destination block number

Comment

You can enter up to 32 characters as step characters.

When you click [View] [Display comment of step and TR] from the menu bar,

the comment appears in the SFC diagram.

POINT You can change the kind of step (diagram symbol) by either clicking of the

diagram symbol in the SFC symbol/program input window, or by pressing a

function key.

If you inadvertently click the wrong tool button, you can re-select the step without

closing the SFC symbol/program input window.

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3) Series transition ( )

n Transition comment

Transition condition number

OK Transition condition

Diagram symbol "TR" is displayed. You can change the diagram symbol by clicking .

Transition condition number Numbers are automatically assigned in the input sequence (in ascending order). To specify a transition condition number, enter a number in the range 1 to 511. After creating an SFC diagram, you can assign numbers once again in sequence from top left to bottom right by sorting.

Comment You can enter up to 32 characters as a transition comment. When you click [View] [Step/Display comment of step and TR] from the menu bar, the comment appears in the SFC diagram.

Program Enter the transition condition program (contact and comparison operation instructions). You can input a number of contacts and instructions using "&" (AND) or "|" (OR). For details of contacts and instructions, refer to section 2.3. For details of the input method, refer to section 3.5.

RUN write button You can perform a "write during RUN" operation by clicking this button. For details of a "write during RUN" operation, refer to section 3-11.

4) Selective branch ( )

OK

Diagram symbol "-- D" appears. You can change the diagram symbol by clicking .

Number of branches Enter the number of branch lines. You can create branch lines equal in number to the entered value, in a single operation. The initial value is "1".

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5) Parallel branch ( )

OK

Diagram symbol

"==D" appears. You can change the diagram symbol by clicking .

Number of branches

Enter the number of branch lines.

You can create parallel branches equal in number to the entered value, in a

single operation.

The initial value is "1".

6) Selective coupling( )

OK

Diagram symbol

"==C" appears. You can change the diagram symbol by clicking .

Number of couplings

Enter the number of coupling lines.

You can create couplings equal in number to the entered value, in a single

operation.

The initial value is "1".

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7) Parallel coupling ( )

OK

Diagram symbol

"==C" appears. You can change the diagram symbol by clicking .

Number of branches

Enter the number of branch lines.

You can create parallel couplings equal in number to the entered value, in a

single operation.

The initial value is "1".

POINTS

Input method used when a branch and a coupling are used together in a single

transition condition

1) For Q/QnACPU

When a branch and a coupling are used together in a single transition

condition, reserve an area for one step using "|" (vertical line) and then enter

the branch and coupling symbols.

Example 1:

Area for 1 step

Example 2:

Area for 1 step

For branch/coupling line entry, entering the number of branches/couplings as "-n"

creates them from right to left.

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8) Jump transition ( )

OK

5

6

5

6

5

Diagram symbol You can change the diagram symbol by clicking .

Jump destination step number

Enter the step number of the jump destination.

When you click the OK button, the display of the step ( ) specified at the

jump destination changes to ( ).

9) End step ( )

OK

10) Rule write

To write a rule, click / / / and drag from the first position to the

last position of the rule entry.

POINT

If you write a rule over the existing step/transition, the step/transition symbol and

operation output/transition condition sequence program are not erased.

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11) Row insert

0 0

1

1 2 2

0 0

1 1

Shift Insert( )

[Edit] [Insert line]

12) Column insert

Ctrl Insert( )

[Edit] [Insert row]

13) Row delete

Delete )Shift(

[Edit] [Delete line]

14) Column delete

Ctrl Delete( )

[Edit] [Delete row]