ProSoft Technology ProLinx-HART Specifications download pdf (Page 35)

DFNT ♦ ProLinx Gateway Configuring the Gateway

EtherNet/IP Explicit Messaging Client/Server Protocol Manual

ProSoft Technology, Inc. Page 35 of 124

July 24, 2013

3.3 [DFNT Client x Commands]

This section defines the EtherNet/IP commands to be issued from the module to

server devices on the network. These commands can be used for data collection

and/or control of devices on the TCP/IP network.

3.3.1 Command List

In order to interface the virtual database with DF1 slave devices, you must

construct a command list. The commands in the list specify the DF1 slave device

to be utilized, the function to be performed (read or write), the data area in the

device to interface with and the position in the virtual database to be associated

with the device data. There is a separate command list for each DF1 master

device emulated. The list is processed from top (command #0) to bottom. A poll

interval parameter is associated with each command to specify a minimum delay

time between the issuance of a command. If the user specifies a value of 10 for

the parameter, the command will be executed no more frequently than every 10

seconds for the serial implementation and 1 second for the network

implementation.

Write commands have a special feature, as they can be set to execute only if the

data in the write command changes. If the data in the command has not changed

since the command was last issued, the command will not be executed. If the

data in the command has changed since the command was last issued, the

command will be executed. Use of this feature can lighten the load on the DF1

network. In order to implement this feature; set the enable code for the command

to a value of 2.

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ProSoft Technology ProLinx-HART Specifications Page 35