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Profibus, Profibus-dp slave communications overview, Profibus-dp – Delta RMC151 User Manual

Page 498: E profibus overview

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RMC70/150 and RMCTools User Manual

The Communications Statistics window provides information on open PROFINET I/O

connections, including producing and consuming registers and the update time. The

statistics also provide advanced information on the Ethernet traffic.

6.9. PROFIBUS

6.9.1. PROFIBUS-DP Slave Communications Overview

PROFIBUS-DP Slave is the communication protocol available on the RMC75P and on the

RMC150E PROFIBUS module. PROFIBUS-DP is an open industrial fieldbus and is vendor

independent, allowing a large range of PLCs and other PROFIBUS masters to control the RMC.

The RMC performs as a PROFIBUS-DP slave, requiring a PROFIBUS-DP master to control it.

The type of the actual master—whether a PLC or other controller—is unimportant.

RMC PROFIBUS-DP Specifications

RMC75P

RMC150E PROFIBUS

Baud Rates

9.6Kbaud to 12Mbaud

Product

Identifier

Number

0x07E1

0x0AC6

Supported

Freeze mode, sync mode, automatic baud-rate detect

Modularity

The RMC is a modular station that can have one module

selected at a time.

Station

Addresses

0-99 (selected by rotary

switches)

1-126 (set in RMCTools or by

Set_Slave_Address function

from a PROFIBUS Class 2

Master)

PROFIBUS-DP Modes

RMC150E and RMC75P
The following modes are available on the RMC150E and RMC75P:

I/O Mode (4 registers)

I/O Mode (8 registers)

I/O Mode (16 registers)

I/O Mode (32 registers)

Each of these modes specifies a number of 32-bit registers, n. For each mode, n registers

are continuously sent from the RMC's first n Indirect Data Map registers to the PLC, and n

registers are always sent from the PLC to the first n registers in the RMC's Variable Table.
Choose the mode with the number of registers you need for your application. For details

on how to use these modes, see the PROFIBUS Mode: I/O Modes topic.
RMC75P Only
In addition to the I/O modes described above, the RMC75P supports Basic/Enhanced

PROFIBUS Modes. These modes are generally more difficult to use. Therefore, most users

will prefer the cyclic modes. For details on these additional modes, see the

Basic/Enhanced PROFIBUS Modes topic.

PROFIBUS Configuration

For details on configuring the PROFIBUS, see the PROFIBUS Configuration topic.

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Delta Computer Systems, Inc.

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