Mitsubishi A2CCPU Manuale utente

REVISIONS

%The manual number

givenonthe

bottom

left

the

back

cover.

Date

Mav.

1990

'Manual

Number

(NA)

66238-A

Rwkion

First

edition

Thank you for choosing the Mitsubishi MELSEC-ASeries

General Purpose Programmable

Controllers. Please read this manual carefully

that the equipment

used to its optimum.

A copy

this manual should

forwarded

the end User.

4.4

4.5

4.6

4.7

4.8

5.1

5.2

5.3

5.4

....

I-....

....

Appendix 1

Appendix 2

Appendix 3

Appendix 4

Appendix

lNTRooUcTl0N

/MELSEC-A

P-

This manual gives the system, specifications and handling of the

A2CCPU General-purpose ProgrammableController(referred to

A2C

this manual).

The

A2C is

baseless building block type CPU which does not use

base

unit

for system construction which includes remote

110

and

terminalmodules

(*1).

The

A2Cuses the MELSECNET/MINI-S3data link system

(*2)

(referredto as MINLS3

this manual)

place

base unit for

data communication with theremote

module

and

the remote

terminal module through5core flat cables or twistedpair cables.

Using Scoreflat cables, the system modules can bearranged

close to each other just as the building block type CPU is used.

Using twisted pair cables, the system modules can be separated

up to

100

meters (328.1

ft)

away from each other

(*3).

This feature

makes

possibleto install the remoteI/O module and the remote

terminal moduleto suit with

the

arrangement of equipmentto be

controlled.

REMARK

.........

"Remote

module" and "remoteterminalmodule" are general

termsforthemodulesmentionedbelow.

Remote

module

Input/output modules connectable to the A2C,

Mitsubishi general-purpose inverter FR-ZZOO

series,MELSEC-F series programmablecon-

trollers

Remote terminal module

Special function modules connectable to

See Section 2.3 for names and

types

of theremote

modules and

theremoteterminal modules.

save theamountofwiringbetweenthe PC and equipmentto be

controlled. Since the PC, the remote

moduleandtheremote

terminal module are connected with twisted paircables or optical

fiber cables,

is possible to install the remote

I/O

module and the

remote terminal module to suit with thearrangement of equipment

to be controlled.

thicker are used.

The maximumallowaMe distance is

meters

(164.1

ft)

when twisted

pair cables of 0.3mm' (22AWG)orthinner are used.

the A2C,RS-232C interface modules

.........

The MELSECNET/MINI-S3 data linksystem has beendesigned to

...

......

Distance allowed when

twisted

pair cables of 0.Smm2(20 AWG)

INTRODUCTION

/MELSEC-A

1.1

GeneralDescription

Operation

This section describes the data communication between the

A2C,

theremote

I/O

module and theremoteterminalmodule.

See

Section

4.2

for the

A2C

functions.

1.1.1

ON/OFF

data

communication between

the

A2C

and

the

remote

I/O

module

ON/OFF data communication

performed using inputs

(X)

and

outputs

(Y).

(1)

Inputloutput number assignment

the remote

I/O

module

The inputloutput numbers

the

systemareassigned

from

X/YOOO

inthe order of the station number

64)

set

for each remote

110

module.

Data communication with

remote

I/O

module

performed

using inputs

(X)

and outputs

(Y)

assigned for each module.

See Section

4.7

for the relationshipbetween station numbers

and

I/O

numbers.

(2)

ON/OFF data communication with theremote

module

The ON/OFF data communication with the remote

I/O

module

performed in the refresh mode.

Fig.

1.1

shows the data communication between the

and

the remote

I/O

modules.

The

sequence

program

UWE

input

(X)

and

output

(Y)

numberstocontrolremote

mod-

(b)

ONIOFF

data

output

(Y)

output.

(c)

ONlOFF

data

from

theinputmodule

istakenin.

MINI-S3

link

Station:nStation:

When the

A2C

running,operations

(a),

(b)

and

(c)

mentionedbelow are executed

repeatedly.

(a)

Thesequence program is executed from step

to END(FEND).

(b)

ON/OFF data of an output

(Y)

the sequence program

output by the MINI43 link.

(c)

ON/OFF data from an inputmodule

taken inbythe MINIS3 link.

Fig.

1.1

OWOFF

Data

Communication

between

th.

AZC

and

the

R.mote

I/O

Modukr

‘I’

L-

INTR0DUCTK)N

/MELSEC-A

Input/output response time

The data communication response time bwteen the

A2C

and

theremote

modules

described below.

/+--

take

in an

ON/OFF

change from the input module,

scan

maximum

required.

When an output

ON/OFF

changed bythe sequence

program,

scan

maximum

required tooutput the

change to theoutputmodule.

When

ON/OFF

controlof theoutputmodule

done by

ONIOFF

data

the input module,

scans

maximum are

required

till

the

ON/OFF

status oftheoutputmodule

changesafter an

ON/OFF

input changed.

INTRoDuCTtoN

/MELSEC-A

1.1.2

Data

communication

betweem

the

A2CCPU

theremote terminal module

(1)

Maximum number of remoteterminalmodules to be con-

nected

A maximum of

remote terminal modulescan beconnected

to the A2C.

(2)

Data communicationwith remoteterminalmodules

(a) Perform thefollowinginitial setting.

The first station number of the remote terminal module

Protocol

See Section

4.2.9

for details ofinitial setting.

(b) Executedata communication with the

FROM0

instruc-

tion.

See the ACPU ProgrammingManual (Common Instruc-

tions)for details ofthe FROM/TO instruction.

(b)

Transmission

designateddata

executingTOinstruction

CPU

MINI-S3

link Remote

terminal

Station number:

Station number: nStation number:

completesignal

Data communication with the remote terminal module is executed

describedbelow.

(a)

The

FROM/TO

and PRC instructions areexecuted bythe sequence program.

(b) Therequest to senddesignateddata

the data is transmittedby executing the

FROM/TO

instruction after executing the PRC instruction.

FROM

instruction execution

Datasendrequest

TO instruction

Datasending

A2C.

signal fromthe remoteterminalmodule.

(d) The A2C turns

the completesigna.1

(Ml)

when

received the sendreceive complete

Fig.

1.2

Data

Communhtion

between

the

and

the

Rmote

Terminal

Module

(3)

Response time

Communicationof

data with one

FROM/TO

instruction

requires approximately

400

ms (when scan time is 100 ms).

i.1

-1

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