User's Manual

http://www.microcyber.cn

Click Export , and the gateway register map list is saved in terms of CSV file in PC/portable

computer.

The detailed Modbus register map is shown as following:

Table 4-3 Modbus Register Map

Modbus Master Webpage Configure Modbus Slave

Function

Code

Read Number

at most

Address

Optional Variables

02 1-2000 10001-19000 State, **_HEALTHY

04 1-125 30001-39000 Hart State

03 1-125 40001-49000 PV,TV,SV,QV,

Device Variable Code

Caution

When Modbus master is reading gateway s Modbus data, the user shall notice:

Gateway Modbus module only supports function codes 02, 03 and 04.

When reading data with function codes 02, 03or 04, the gateway supports to read multiple

data continuously.

Function codes 02, 04: During continuous read, there should not be register addresses which

are not configured by the gateway. If there are register addresses which are not configured by

the gateway, the gateway shall reply error data frame.

Function codes 03: During continuous read, there may be register addresses which are not

configured by the gateway. For the register addresses which are not configured by the gateway,

the reply data is 0.

When the user is importing the Modbus Register map, if the device doesn t exist in the device

mark, when the data is read, the gateway shall reply error data frame.

4.4 Private Protocol

WirelessHART gateway supports two types of protocols, active upload protocol and downward

communication protocol.

4.4.1 Active Upload Protocol

Gateway could only process supportive commands provided by HART protocol. For some

customized commands, the gateway shall convert these commands to private protocol data format,

and send out via TCP/IP. Meanwhile, gateway shall send out field device s burst info via private

protocol way. The transfer data flow is ASCII characters, and each data frame begins with [ , and

ends with ] . There is , in each character, and byte range is 0~255. The TCP port number of private

protocol is 8880.