Mitsubishi Electric Melsec-k Betriebsanleitung

CONTENTS

Introduction

..........................

....>....

........................................................

Hardwarecomposition and operation

..........................................................

2.1 .Hardwarecomposition

................................................................................

2.1.1

Hardwaresystemcomposition

.................................................................

2.1.2 . CPUsystemcomposition

........................................................................

2.2

Logicoperations for instructions

....................................................................

2-2-1

Basic operation of theprogrammable controller

...........................................

2.2.2 .Arithmeticprinciple

..............................................................................

2-3

Program memory and datamemory

.................................................................

2.4.

Temporary memory

Refer toitem 3.2

.......................................................

2.5

Timer, counter

Refer toitem

3.5

...........................................................

2.6

External failurememory

Refer toitem 3.4

..................................................

2.7

Dataregister

Refer toitem 3.3

..................................................................

2.8

Input/Output unit

Refer toitem 3.1

............................................................

....

Sequence until programming

.....................................................................

3.1

Assignment of theinput/output numbers

........................................................

3.2

Temporary memory

...............................................................................

3.3

Dataregister D .......................................................................................... 18

3.4 . External failurememory

..........................................................................

3.5

Timer, counter

....................................................................................

Instructionfunctions

..............................................................................

4.1 . Instructions list

........................................................................................

4.2

Types and compositionof instruction words

....................................................

4.3 . Sequence instructions

.................................................................................

4.3.1 . AND, AN.1 ........................................................................................ 23

4.3.2 .

OR,

OR1

............................................................................................

4.3.3 . LD, LDI

...........................................................................................

4.3.4 .

ANB

................................................................................................

4.3.5 .

ORB

................................................................................................. 25

4.3.6

MC,

MCR

.........................................................................................

4.3.7 .

SET,

WST

..........................................................................................

4.3-8

SFT

.................................................................................................

.....................................................................................................

4-3-9 CJ

-II

4-3-1 1

OUT

.....................................................................................................

4-3-10

. PLS

................................................................................................

4-4

. Data handling instructions

..................................................

.......................

4-4-1

MOV

...Datatransmission

......................................................................

4-4-2

...Larger (dataco.rnparispn)

..............................................................

4-4-3

...Smaller (datacomparison)

.......

...........................................

.........

4-4-4

...

Coincidence(datacoincidence) .......................................................

.4.4. 5.

...Addition

..................................................

.............................

.....

..........................................................

.........

.....

4-4-6.

...

Subtraction

..........e..

4-4-7

BCD

...................................................................................................

4-4-8

. BIN

...................................................................................................

4-5

Program control instructions

.*....I

......

.......

................

.................................

4-5-1

NOP

...

.......................................................................................................

4-5-2. END

.....................................................................................................

Programming

.................................................................................................

5.1

Programmingprinciples

................................................................................

5.2

Sequenceinstructions and program.examples ................................................... 41

5.2.1

Simplecircuits by AND and

...............................................................

5.2.2

Complicated circuits

ANB

and

ORB

...................................................

5.2.3 . Circuitswith common control lines

.............................................................

(1) Circuit separation at

contact .................................................................. 43

(2) Use

master control MCand

MCR

.........................................................

(3) Use

conditionaljump

....................................................................

5.2.4 . Timer circuit

..................

.,.

..........................................

..........................

(1)

delay circuit

...................................................................................

(2) OFFdelaycircuit

.....................................................................................

(3)

Long-timetimer

...............................................................

.....................

(4) Circuitsby analogtimer

.........................................................................

5.2.5 . One-shot circuits

...............................................................

;

...................

(1) One-shot circuit for

time

...................................................................

(2) One-shot circuit for OFFtime

............................................

....................

...

,.--,

5.2.6

Counter circuit

...................................................................................

(1)

Count, reset

........................................................................................

(2)

Preset counter .....................................................................................

5-2-7

Flicker circuit

.....................................................................................

5-2-8

Pulse circuit

.......................................................................................

(1)

Rise detection pulse

..............................................................................

(2)

Drop detection pulse

.............................................................................

5-2-9. Holding circuit for power failure by temporary memory

................................

(1)

Use

the Latch unit

KL6l

.....................................................................

(2)

Latch switch

with

K2CPU

.................................................................

5-2-

. Star-delta motor starting circuit

.............................................................

5-3

Program examples for datahandling instructions

..............................................

5-3-1

Switching

timer set values ..................................................................

5-3-2

Output

the external indicator for the timer time limit

................................

5-3-3

. Counter setting by external digital switch

..................................................

5-34

Addition

....

......................................................................................

5-3-5

Remote counter setting .........................................................................

5-3-6

. Time counting for xx

rnin

sec

..............................................................

5-3-7

Shift instructions

................................................................................

5-3-8

Positioning control

..............................................................................

(a)

Positioning control by movement amount

..................................................

(b) Positioning control by absolute address (for full

scan)

...................................

(b’) Positioning control

absolute

address

(with use

arid

CJ)

....................

. Forms of various programming sheets

............................................................

(1)

Sheets form

1-1

(2)

Sheets form

1-2

(3)

Sheets form

(4)

Sheets form

(5)

Sheets form

(6)

Sheets form

(7)

Sheets form

(8)

Sheets form

Unit arrangement table

)

...........................................

Unit arrangement table

(2/

)

...........................................

Input/output list

..........................................................

Programming sheet

.......................................................

Temporary memory sheet

...............................................

Data register list

...........................................................

External failure memory list

.............................................

Timer. counter list

........................................................

Introduction

The MEESEC-K series is equipped with an instruction function convenient for machine control,

that even complicated control can be programmed easily.

The program language uses language for sequencecontrol (a combination

relay symbol format

and logicsymbol words),

that language of the same system as for the conventionalMELSEC-

007B

and

008

is followed, but the symbolshave been partly changed

more general expressions,

Example

(

Example

(1)

ANS

ANB,

ORS

ORB

(2)

Input/output device name:

I000

XOOO

0000

YO00

and sequence instructions and data handling instructions have been newly added.

[Example: Universal shift, conditional jump, pulse instructions, addition and subtraction,

magnitude comparison, data movement

(MOV),

etc.]

In this way, the series

programmable controller with a powerful program function. Please

study this manual carefully to master the programming methods,

that the functions can be

used efficiently.

For

program input and output operations, refer

the “Handling

instructions for the programming unit”.

--.

NOTES:

(1)

Thisprogramming manualcoversthe basic functions

the

KOJ, KO,

K1,

K2,

KOE

and

K2E.

(2)

The

K2CPU-S3

is provided with special funcitons.

Refer tothe “Instruction Manual

SpecialFunctions of the

K2CPU-S3”

for the program-

ming of the special functions.

Refer tothe “Instruction Manual

SpecialFunctions of the

KOJ”

for the programming

the speicial functions.

“

(3)

The

KOJ

is provided with special functions.

-1-

Hardware

~~ltaap~~iti~nm

and

operation

The hardware outlines are described to deepen the understanding

for

programming.

2-1.

Hardware

compssiticsn

2-1-1.

Hardware

system

comp~~iti~n

The units

shown

in the following figure are attached to the

base

unit

compose the

system.

Peripherai support base

K6PSB

Power supply

24V

100

Peripheral units

/output units

K2CPU

MN6

I/O

cab1

K61CBL

Fig.

2-1.

Hardware

system

composition

‘\

Base

Unit

-2-

2-1-2.

CPU

system

composition

The

CPU

operation functons are shown in the following figure;

CPU

User program

Peripherals

Memory

("O~memojy

KlROM 1s

K2ROM 2s

RAM memory

(KlRAM)

inter-

face

K~ROM

KlROM

Data

rnernory

Instructions

-1

e----

---

e---

Logic

processing Register

Input/

oulput

inter

face

control circuit

(Base unit)

Fig.

2-2.

CPU

system

composition

Notes:

Program writing for the

user

program memory uses the

KlRAM.

The

CPU

system composition does not coincide with the hardware.

discreet circuit is obtained

for

K2CPU.

Simultaneous use

ROM

and

RAM

is not possible.

-3-

2-2.

Logic operations

for

instructions

2-2-1.

Basic operation

the programmable

The basic operation of the programmable

controller is shown in the figure on the right.

This operation is the same as for

computer

the stored program method, and the hard-

ware composition also is similar,

that this is

called

programmable controller of the

quasicomputer type.

@First, the contents

the program counter

showing the program step number aregiven

to the memory address, and the contents

are read.

The read memory contents are translated,

and discrimination is executed for

AND,

OR,

and other instructions as well as input

and output numbers.

According to the discriminated source

(logic input signal to be included) and the

instructions, AND,

OR,

and other logic

operations as well as output operation are

executed.

controller

is added to the program counter contents, and specification

the next step number is

ex-

Fig.

2-3.

Basic logic operations

ecuted.

The above

operations are executed for each

step number, Le. each instruction in the

Memory

Step

number

programmable controller, and sequential

execution is executed in the sequence

the

numbers for all step numbers stored in the

memory. This is called scanning.

The figure on the right shows the concept for

scanning. The above

operations are ex-

ecuted in the sequence of the program

numbers according to the program counter

contents, return to number

executed when

the

END

instruction is reached, and then the

sequence is repeated. This operation is called

scanning, and with one scanning, all inputs

written into the memory are taken in, logic

operations are executed, and the logic

operation results are put out to all outputs.

--I_---___

----.--

Fig.

2-4.

Scanning operation

The scanning speed about corresponds to the electromagnetic relay response speed, and this is

called the logic operation speed.

shown in the above, serial arithmetic operations are executed in the programmable controller,

but as the logic operation speed is high, all inputs aretaken in, and logic operation results are put

out to

all

outputs, the operation from the outside appears to be the same parallel arithmetic

operation as for electromagnetic relays.

;

-4-

2-2-2.

Arithmetic principle

The arithmetic principle is explained with the

circuit shown in the figure on the right as an

example.

The program for this circuit is as follows with

MELSEC-K.

The executionprocess for the circuit example

(a) is shown in

(b).

InpuUoutput

Step number Instructions number

(a) Circuit example

Input of the on-off status of X1

Input of the on-off statusof X2 and

operation with

Xl.Xl+X2

AND

Input of the on-off status of X3 and

AND

operation

with (X1

X2). (X1

X2).

Output of the operation result (X1

X2) X3 to Y14.

Input

(X)

Output

(Y)

+x2

iIL,

OK'

(

sxz

)

0x3,

(XI

+xz

)

0x3

'12

OT!T

Y14

AND

Input selection part

Output selection part

A: Register

(answer register)

(auxiliary register)

'Fig.

2-5.

Arithmetic principle

.LU:

Logic processing unit

IR:

Instructions register

.(b)

Execution process

Explanation

the arithmetic principle

The execution process for this program and this hardware compostion

as follows.

Step

@The program number

isread

from

the memory, the instruction

is stored in the instructions

-5-

IW,

and the input/output number

is sent to the input selection part.

*The same applies for subsequent program.

is selected by the input selection part

The

on-off status of

is taken in, and

is stored in register

via register

is selected by the input selection part

The on-off status of

is taken in and stored in register

@ The contens

in register

and

in register

are sent tothe logic processing unit,

LU,

This operation result

(X1

X2)

is sent to register

where it is stored, Register

becomes

ORX2

operation

executed, and the operation result for

(X1

X2)

is obtained.

the answer register.

ANDX3

is selected

the input selection part

The on-off status

is taken in and stored in register

Thecontents

(X1

X2) inregister

and

inregister

are sent tothe logicprocessing

unit

LU,

AND

operation is executed,and the operation result for

(Xl

X2)

is obtained.

This operation result

(X1

X2)

is sent to register

where it is stored.

Y14

is selected by the output selection part

The operation result

(XI

X2)

from register

sent to output

Y14.

Y14

has an output register, where this operation result

stored and kept.

Theabove example treated

and

asinput and output, but seen from the logic processing

unit

(LU),

and

are preceding units providing conditions or data for logic processing

and units for output of the operation results. These units seen from the

are called

“devices”. There are the following types of devices:-

OUTY14

........

Input

.........

output

........

Temporary memory

.........

Timer

.........

Counter

.........

External failure memory

........

Data register

Input and output

the

LU.

.........

Constant Only input by the

LU.

-6-

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