Quantum 890 USE 155 Manual de usuario descargar pdf (Pagina 13)

Modbus to Ethernet Bridge

Figure 3 shows an example of message address mapping between a Modbus Master

and a Modbus Slave using two Bridges with an Ethernet link.

Figure 3 Mapping Modbus and IP Addresses

Modbus

Master

Modbus

Slave(s)

Ethernet

Bridge

Modbus message to

Slave address 10

192.168.001.024

Bridge routes message to Slave

according to user–defined setup:

Message Slave Address (10)

Fixed Slave Address (1 ... 247)

Modbus – IP Address

Mapping Entry:

010 : 192.168.001.024

These are the events in the message routing:

H The Modbus Master sends its message containing address 10 decimal to

Bridge A.

H You have set an entry in the mapping table in Bridge A. Your entry specifies that

messages with address 10 are to be mapped to IP address 192.168.001.024.

H Bridge B has that IP address and receives the message.

H Depending on the option you set in Bridge B, the message is routed either to

the Modbus Slave device at address 10 as specified in the message, or to a

fixed Slave address in the range 1 ... 247.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 54 55

Sin comentarios

Quantum 890 USE 155 Manual de usuario Pagina 13