Schneider Electric LUFP7 user manual ABC Configurator, Modbus Network

1. Introduction

ÖEach LUFP7 gateway is shipped pre-configured so as to make it easier to operate and the factory settings can be used as a basis for a configuration which will best meet the user’s expectations. The typical operations applicable to this default configuration are described in chapter 6 Configuring the Gateway, page 44.

The Profibus-DP network is totally separate from the Modbus network. The frames on a network are not directly “translated” by the gateway to generate frames on the other network. Instead, the exchanges between the content of the gateway’s memory and the Modbus slaves make up a system which is independent of the one which is entrusted with managing the exchanges between this same memory and the Profibus-DP master.

So the user must ensure that the size of the Profibus-DP data corresponds to the size of the memory used for the Modbus exchanges, because the gateway configures its Profibus-DP exchanges on the basis of the memory used by the Modbus frames.

The two synopses which follow illustrate the independent management of each of the two networks:

— Managing Gateway ↔Modbus slaves exchanges —

ABC Configurator	Configuration of
	Modbus exchanges
– Slave A	by the user
– Command A1
– Query A1RQ
Frame → • • •	Data (Out)	• • •
– Response A1AQ
Trame → • • •	Data (In)	• • •
– Slave B
– Command B1
– Query B1RQ
Trame → • • •	Data (Out)	• • •
– Response B1AQ
Frame → • • •	Data (In)	• • •

Transfer of the configuration

LUFP7 gateway

0x0000

:

Input

memory

:

0x00F3

:

0x0200

:

Output

memory

:

0x02F3

Managing

exchanges with the

Modbus slaves

Slave A

Slave B

Modbus Network

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