Rockwell-automation MPP Processor Moduile Manual de usuario descargar pdf (Pagina 20)

20

MPP

October

200

5

–

Issue 6

Triguard

SC300E

SERVICING

SCOPE

The

MPP

is

not

field

-

repairable.

Field

servicing

operations

are

confined

to

the

routine

replacement

of

SRAM

backup

batteries,

and

the

total

replacement

of

faulty

MPPs.

Spare

keys

are available.

Faulty

MPPs

should

be

returned

for

repair.

Before

a spare

MPP

is

fitted,

ensure

that

both

the

positions

of

the

links

and

the

types

of

pre

-

programmed

device

are

identical

to

those

on

the

MPP

that

is

being

replaced.

While

MPPs

are

out

of

the

chassis

it

is

good

practice

always

to

leave

the

front

panel

keyswitch

in

the

RESET

position.

CAUTION

1

Do

not

attempt

to

repair

a fault

by

replacing

blown

fuses

F1

or

F2.

The

fault

that

caused

the

fuse(s)

to

fail

will

remain.

CAUTION

2

Spare

MPPs

should

normally

contain

a full

complement

of

pre

-

programmed

devices.

Should

it

be

necessary

to

transfer

pre

-

programmed

devices

(EPROMs

only)

from

a faulty

MPP

to

a good

one,

use

the

normal

handling

procedures

for

electrostatically

sensitive

devices

and

take

extreme

care

not

to

bend

the

IC

pins.

DIAGNOSIS

A faulty

MPP

will

be

apparent

by

the

abnormal

state

of

its

front

panel

LEDs.

This

may

be

accompanied

by

audible

alarms

etc.

Note

that

in

normal

operation,

the

On

Line,

Run

and

Health

LEDs

will

be

on

and

the

Test

LED

will

flicker

at

a rate

determined

by

the

preset

ladder

scan

rate.

CONFIGURATION

Configuration

is

via

links

on

the

board.

Module Link settings

Link

settings

are

given

in

Table

3

-

1

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