Vega WHA-GW-WIRELESSHART GATEWAY Bedienungsanleitung PDF herunterladen (Seite 61)

WHA-GW-*

Configuration

221981 2011-07

Wired Communication Parameters - MODBUS protocol

Parameter Description Default

Bus Address

Selection

(serial)

Select if you prefer to specify the Gateway's polling

address via the DIP switches inside the Gateway

housing (see chapter 6.1) or under software control.

DIP switches

Bus Address

(serial)

Select the Gateway's polling address. This drop-

down list depends on the value of Bus Address

Selection. If the value of Bus Address Selection is

"DIP switches", this parameter is read only.

Baud Rate

Selection

(serial)

Select if you prefer to specify the Gateway's baud

rate via the DIP switches inside the Gateway

housing (see chapter 6.1) or under software control.

DIP switches

Baud Rate

(serial)

Select the Gateway's baud rate. This drop-down list

depends on the value of Baud Rate Selection. If

the value of Baud Rate Selection is "DIP switches",

this parameter is read only.

19200

Parity Bit

(serial)

Select the type of parity bit (odd, even or none) that

you wish to use over the asynchronous serial

protocol.

none

Stop Bit (serial) Select the number of stop bits (1, 1.5 or or 2) that

you wish to use over the asynchronous serial

protocol.

Port number

(Ethernet)

Port number for Modbus TCP 502

Swap option

(Serial/Ethernet

)

The Modbus 32 bit floating point values will be

transmitted in the "Big Endian" style. To swap

registers, choose one of the following options.

In the following examples a double word [0xABCD]

is stored into Modbus registers using different swap

options.

Big Endian: no register swap

registers: Big Endian

Source bytes: [ 0xABCD ]

Target bytes: reg_0: [ 0xAB ] reg_1: [ 0xCD ]

Little Endian: register swap

registers: Little Endian

Source bytes: [0xABCD]

Target bytes: reg_0: [ 0xCD ] reg_1: [ 0xAB ]

Big Endian

Modbus

address

setting

The Modbus starting register of each device in the

WirelesHART network is displayed in a network

explorer table (see chapter 5.6). Select a device in

the list to display its Modbus starting register

address on the right-hand side.

Available only online.

Further information about Modbus mapping: see

chapter 6.5.

Table 5.10Wired Communication Parameters - MODBUS protocol

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 95 96

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