Port-based Routing Settings
Find these settings on the Port-based Routingtab and page .
Up to four TCP port-based routing rules can be defined. These rules correspond to TCP ports 1 ~ 4 that you configure in General Settings . For each rule, you need to set the following:
• ID Shift : Specify a positive or negative number that will be added to the contents of the ID field of each Modbus request satisfying the rule (for more info, see Slave ID Shifting ). Leave at 0 to disable ID shifting.
• Destination : You can select one of the four serial ports (channels) or one of the four TCP Slaves .