Introduction

The addressing method of data associated with controller input/output depends on the platform, I/O location, and topology.

A summary of addressing methods is provided for the following platforms:

Modicon M580

For information about the Modicon M580 application memory structure, refer to the chapter on BME P58 xxxx CPU Memory Structure.

Data addressing method allowed depending on the module location in the architecture:

Addressing (addressing example)

Local rack

RIO Drop

DIO

CANopen

ASI

Profibus

EIO x80

EIO Quantum

S908

Located I/O

Topological Addressing

Topological

(%lr.m.c)

X

–

–

X

–

–

X

–

IODDT

(%CHr.m.c)

X

–

–

X

–

–

X

–

Flat or Modbus Addressing

State RAM

(%lx)

–

–

X

X

–

–

–

–

Located Memory

(%MWx)

–

–

X

X

–

–

–

–

Unlocated I/O

Device DDT

PLC0_dx_ry_sz_Module

X

X

X

–

X

X

X

X

X Allowed addressing method.

– Not allowed addressing method.

Modicon M340

Data addressing method allowed depending on the module location in the architecture:

Addressing (addressing example)

Local rack

DIO (NOE scan)

DIO (NOC scan)

CANopen

ASI

Profibus

Located I/O

Topological Addressing

Topological

(%lr.m.c)

X

–

–

X

X

–

IODDT

(%CHr.m.c)

X

–

–

X

X

–

Flat or Modbus Addressing

State RAM

(%lx)

X

–

–

–

–

–

Located Memory

(%MWx)

X

X

X

X

–

X

Unlocated I/O

Device DDT

PLC0_dx_ry_sz_Module

–

–

–

–

–

–

X Allowed addressing method.

– Not allowed addressing method.

Modicon Quantum

Data addressing method allowed depending on the module location in the architecture:

Addressing (addressing example)

Local rack

RIO Drop

DIO (NOE scan)

DIO (NOC scan)

EIO x80

EIO Quantum

S908

Located I/O

Topological Addressing

Topological

(%lr.m.c)

X

–

–

X

–

–

IODDT

(%CHr.m.c)

X

–

–

X

–

–

Flat or Modbus Addressing

State RAM

(%lx)

X

–

X

X

X

–

Located Memory

(%MWx)

X

–

X

X

X

X

Unlocated I/O

Device DDT

PLC0_dx_ry_sz_Module

–

X

–

–

–

–

X Allowed addressing method.

– Not allowed addressing method.

Modicon Premium

Data addressing method allowed depending on the module location in the architecture:

Addressing (addressing example)

Local rack

DIO

(ETY scan)

DIO

(ETC scan)

CANopen

Located I/O

Topological Addressing

Topological

(%lr.m.c)

X

–

–

–

IODDT

(%CHr.m.c)

X

–

–

–

Flat or Modbus Addressing

State RAM

(%lx)

–

–

–

–

Located Memory

(%MWx)

–

X

X

X

Unlocated I/O

Device DDT

PLC0_dx_ry_sz_Module

–

–

–

–

X Allowed addressing method.

– Not allowed addressing method.

Modicon Momentum

Data addressing method allowed depending on the module location in the architecture:

Addressing (addressing example)

Momentum Bus +

I/O-Bus

Located I/O

Topological Addressing

Topological

(%lr.m.c)

–

IODDT

(%CHr.m.c)

–

Flat or Modbus Addressing

State RAM

(%lx)

X

Located Memory

(%MWx)

X

Unlocated I/O

Device DDT

PLC0_dx_ry_sz_Module

–

X Allowed addressing method.

– Not allowed addressing method.