Mitsubishi Digital Electronics FX0 Manual

A SERVICE OF

next previous

FX Series Programmable Controllers Devices in Detail 4

4-3

4.3 Auxiliary Relays

Device Mnemonic:

M

Purpose:

Internal pro

g

rammable controller status fla

g

Alias:

Auxiliar

y

(coil/ rela

y

/ contact/ fla

g

)

M (coil/ rela

y

/ contact /fla

g

)

M (bit) device

Available forms:

NO ( ) and NC contacts and output coils ( )

(see example device usa

g

e for references)

Devices numbered in:

Decimal, i.e. M0 to M9, M10 to M19

Further uses:

General stable state auxiliar

y

rela

y

s - see pa

g

e 4-3

Batter

y

backed/ latched auxiliar

y

rela

y

s - see pa

g

e 4-4

Special dia

g

nostic auxiliar

y

rela

y

s - see pa

g

e 4-5

Example device usage:

4.3.1 General Stable State Auxiliary Relays

• A number of auxiliar

y

rela

y

s are used in the PLC. The coils of these rela

y

s are driven b

y

device contacts in the PLC in the same manner that the output rela

y

s are driven in the

pro

g

ram.

All auxiliar

y

rela

y

s have a number of electronic NO and NC contacts which can be used b

y

the PLC as required. Note that these contacts cannot directl

y

drive an external load. Onl

y

output rela

y

s can be used to do this.

• For more information about device availabilit

y

for individual PLC’s, please see chapter 8.

For device availabilit

y

when usin

g

an FX fitted with an FX2-40AW/AP please see pa

g

e 9-6.

PLC FX0(S) FX0N FX FX(2C) FX2N(C)

General auxil-

iar

y

rela

y

s

496

(M0 - 495)

384

(M0 - 383)

500

(M0 - 499)

500

(M0 - 499)

500

(M0 - 499)

Batter

y

backed/

latched rela

y

s

16

(M496 - 511)

128

(M384 - 511)

524

(M500 -

1023)

1036

(M500 -

1535)

2572

(M500 -

3071)

Total available 512

512

1024

1536 3072

X0

X1

1

M507

2

M507

Available devices: