MB52XX Modbus Gateway
User Manual
Configuration
and
Setup
After
TCP Settings
configuration is finished, click on
Save Configuration
button to save all changes that have been
made
.
A
Save Successfully
message will show up, and the web browser will be redirected back to the
TCP Settings
page
.
4.6.6
Slave ID Map
The system uses the Modbus ID to route Modbus
’
request commands from a Modbus master node to the related
Modbus Slave node
.
It is important to define ID mapping for each Modbus Slave node
.
For every Modbus Slave
node, there should be a correct Virtual ID
(
Alias ID
)
and Real ID defined in the mapping
Figure 4.16 shows the Slave
ID Map settings
.
To configure Slave 2
’
s parameters, check the
Enable
box to enable Slave
.
Then, select the
corresponding Slave interface
.
Slave Interface
:
When a port is set to
Modbus
slave mode, a slave interface will be created
.
Select a radio
button of a port number behind the
Slave Interface,
which can be any one of the listed
COM
/
VCOM
/
TCP ports
.
Slave ID Setting Mode
:
Next, select the mapping between real slave ID and Virtual ID to modify the slave ID
setting as needed
.
o
Slave ID Virtual
maps a virtual ID to a real ID by the
Slave ID Count
Figure 4.16 depicts Slave ID settings
of COM02 to have real slave ID from 1 to 16 mapped from virtual ID 17 to 32
.
Slave ID Virtual
refers to a Virtual ID for the reading Master node
.
Slave ID Real
is the starting real ID within this interface
(
COM02 in Figure 4.16
Slave ID Count
is the number of slave devices in this interface that are mapped
.
Figure 4.16 Slave ID Map Page with Slave ID Setting in Alias Mode
Note
:
Master and Slave IDs can be set on COM, VCOM, and TCP
.
However, COM works only with serial ports while TCP and VCOM operate via
Ethernet ports
.
