Atop MB5400, Руководство пользователя

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Atop Modbus Gateway
MB5400 Series
User’s Manual V 1.3
36
3.7.6 Slave ID Map
The system uses the Modbus ID to route Modbus’ request commands from a Modbus master
node to a respective Modbus slave node. It is important to define ID mapping for each Modbus
slave node. For every Modbus slave node, there must be a correct Virtual ID (Alias ID) and
Real ID defined in the mapping. Fig. 3.19 shows the Slave ID Map settings. To configure Slave
1’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
for you. 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 either Alias Mode or Offset Mode to modify the slave
ID setting as you needed.
o
Alias Mode maps a virtual ID to a real ID, one at the time. Fig. 3.19 depicts Slave
ID settings of an Alias Mode with Alias ID = 8 and Real ID = 16.

Alias ID refers to a Virtual ID for the reading Master node.

Real ID is the real ID from the slave node.
Fig. 3.19 Slave ID Map Page with Slave ID Setting in Alias Mode
o
Offset Mode refers to a range of defined ID maps. Fig. 3.20 depicts Slave ID
settings of an Offset Mode with Slave ID Start = 8, Slave ID End = 16, and Slave
ID Offset = 0.