Mitsubishi Electric MELSEC-A Manuale utente

REVISIONS

'The manual number

given on the bottom left

the back cover

Dgte

Mar.,

1994

*Manual

Number

(NA)

66464-A

Revision

First edition

INTRODUCTION

Thank

you'forchoosing the .Mitsubishi

MELSEC-A

Series

General

Purpose

PpgrammabteControl-

lers. Please read this manual carefully

that the equipment

used

its

optlmum.

copy

this

manual should be forwarded

the end User.

CONTENTS

GENERALDESCRIPTION

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

1 -1

SPEClFICATIWS

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

2-1

-2-2

2.1 GeneralSpecifications

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

2.2

PerfomeSpecifications

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

2-2

HANDLING

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

3-1-3-4

3.1 Handhnglnstmctions

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

3-1

3.2 PattNames

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

3-2

3.3 Settings

EachPart

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

-4

SELF-DIAGNOSTICTESTING

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

4.1Self-LoopbackTest

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

4.2 Inter-StationTest

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

4 -2

APPENDICES

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

APP-1

APPENDIX

OUTSIDE DIMENSIONS

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

APP

.....

........

....

.........

...........

.-.

-_.-

GENERAL

DESCRIPTION

MELSEC-A

GENERAL

DESCRIPTION

(1)

This manualdescribes the specifications, partnames, and self-diagnos-

tic testsof the AJ72T25B.

The AJ72T25B is used with in a MELSECNET/B

data

link

system

(Bus

system).

(2)

The followinggives the application, applicable

cable,

andinstallation

location of the AJ72T25B:

Application

As a remote

I/O

station

Applicablecable

Twisted

wire

pair

cable

Module installation location

CPU slot of a main base unit

(3)

The following manual gives details about the MELSECNET/B data link

system:

MELSECNET, MELSECNET/Bdata link system reference manual

(IB(NA)-66350-A)

rs,

1-1

SPECIaFICATIONS

-M€LS€C-A

SPECIFICATIONS

This section givesthe general specifications

the datalink system and the

performance specifications

./,

the

AJ72T25B.

2.1

GeneralSpeciflcatlons

The general specifications

the data link system are given below:

Item

Speciflcatiom

Operating ambient temperature

Storage ambient temperature

10 to 90%

RH,

non-condensing

Operating ambient humidity

-20

~ ~ ~~ ~~~~~~

Storageambienttemperature

10to 90%

RH,

non-condensing

Vibration resistance

Shock resistance

Frequency Sweep

Count

Amplitude

Acceleration

E;onforms to

2JIS

091

,l,o

times

0.075

(0.003

in)

octave/

150

minute)

9.8 m/s2 (1s)

Conforms

'2JIS C 0912 (98 m/s2(loa)

times in

directions)

Noise durability

Dielectric withstand voltage

Class

groundeing; Ground

the panel

proper grounding is not available.

Grounding

Insulation resistance

1500

VAC for

minute across AC external terminals and ground

Operating ambience Free of corrosive gases. Dust should be minimal.

Mi2

or greater by

500

VDC insulation resistance tester across AC external

terminals and ground.

Cooling method

REMARK^

One octave marked

indicates achange from the initial frequencyto double orhalf frequency.

For example, any of the changes from

to 20

Hz,

from 20 to

Hz,

or 20 to 10

are referred

to as one octave.

'2: JIS: Japanese Industrial Standard

2-1

2.2

PerformanceSpecifications

The

performanue specificationsof

the

AS72T25B

arb

given below:

Item Specifications

Model

Y total 512 points

Output

linkage per station

allocated to communication

(x)

Max. number of

device

points

AJ72T25B

MELSECNET Max. link pointsfor one

modestation

X(wints)+Y(wints)

2x W (points)

512bytes

MELSECNET

Max. link points for one

composite mode station

Xfpoints)+Yfpoints~

Wfpoints)

512 bytes

Currentconsumption

VDC)

0.3

~~ ~ ~~

Weight Kg (Ib)

Frame synchronous method Synchronous method

Half duplex bit serial method Communicationmethod

125K bpd250K bpd5OOK bpdl

bpsCommunication speeds

msec

Allowable momentary power failure time

0.5

(1.1)

Transmission path method

Overall extenslon distance

NRZl

method

Modulation method

Max.'32 units (1 master station, 31 local or remote

I/O

stations)

Number of connected stations

Vanes according to the communication

speed

~~~

Bus

type

Transmission format

~~~

Conforms to

HDLC

(frame method)

Error control system

Retry due to CRC (generating polynomial X16

X12

and timeout

RAS

function

Terminal block

Connecting terminal

Diagnostic function such as hostlink

lirie

Applicablecable

Shielded twistedwire pair cable

(KNPEV-SB

0.5SQ

REMARK

(1)

The overall extension distance is the

distance between both end stations in

the MELSECNET/B data link system.

(2)

The relationship between communication

speeds and the overall extension distance is shown below:

Twisted wire pair

cable

Communication

Speeds

Overall extension 1200 m 600 m

400

distance

(3936

ft)

(1968 ftl

(1312

ft)

(656

2oo

ftl

2-2

HANDLING

M4ASfC-A

HANDLING

3.1

Handling

Instructtons

Handle the

AJ72T25B

as indicated below:

(1)

Protect the case from impact, since

is made from resin.

(2)

not touch or remove the printed circuit boards from the case.

(3)

When wiring, make every effort

keep wire offcuts from entering the

module. Make sure

remove any which do enter the module.

(4)

install

the

module

the base unit, tighten the screws as indicated:

Scnw

Location

TighteningTorque Rmge

Nan(kgmcm) [Ib-inch]

Cable terminal screw (M3.5 screw)

78.4 (8) [6.93] to 117.6 (12) [10.39]

Module

mounting screw (M4 screw) 58.8 (6) [5.2]

88.2

(9)

[7.79]

Terminal

block

mounting screw

(M3.5

screw) 58.8 (6) [5.2] to 88.2

(9)

[7.79]

Name

(Enktgod

Vim)

Station Number Setting Switch

Mode Selection Switch

MODE

Baud Rate Switch

RS-422

Connector

** **

Application

Set a station number within

the

range of

31.

Set the

X10

switch corrdponding to the first number of the station.

Set the

switch corres nding to the secondnumber of the station.

Set

these swltches widherange of

31,

The following modes can be selected using the mode selection switch:

Setting

Number Name Description

Online (U.R)

Online.(A.R)

Releases the self station.

Offiine

~ ~~~

Automatically returns when the

module

operates normally.

Does

not qutomaticaily return when

the module operates normally.

3.4

Unused'

Test

(B.M) Inter-station test mode (master

station)

Self-loopback test

Test

(S.R)

Test

(BS) Inter-station test mode (slave

station)

Unusable.

the switch

set to any number from

the LED (DATA) goes

and the module

goes

into

the

offline

state.

Number

Setting

Baud Rate

250K

bDs

125K

bps

50OK

bps

and the module goes into the offline state.

Unused'

~~ ~ ~~~

the switch is set to any number from

the LED (DATA) goes ON

Used to connect

peripheral

devices.

Convered when not in use.

3-3

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