ELPRO 805U-E Bedienungsanleitung PDF herunterladen (Seite 49)

Chapter Three Operation

Page 49 © April 2007

The Modbus configuration for unit C is shown below.

Unit C is configured with Modbus TCP Server enabled and Device ID = 1, so that the

Modbus TCP Client at B can connect and read the status of the onboard digital input. Unit C

also has Modbus TCP to RTU Gateway enabled (see section “3.13.3 Modbus TCP to RTU

Gateway”) so that the Modbus TCP Client at B can communicate with the serial Modbus

RTU device D.

The configuration of unit B is shown below (accessible via the “I/O Transfer” configuration

page).

It can be seen that Modbus TCP Client has been enabled with a 500msec scan rate, meaning

that there will be a 500msec delay between each of the mappings directed at any server. The

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ELPRO 805U-E Bedienungsanleitung Seite 49