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Abstract: . . . Port Number : The MODBUS TCP/IP specification states that all MODBUS TCP devices respond to (server) and send (client) on port 502. This will allow a MODBUS TCP/IP server device to communicate with an H0/H2/H4ECOM100 MODBUS TCP/IP client through a firewall. Unit ID: The Unit ID may be required for the following applications: MODUS/TCPtoMODUS/RTU converters: These devices convert Ethernet . . .
. . . entered IP address. H0/H2/H4 ECOM100 Client Peer to Peer Configuration Page 6 DHCP & HTML Configuration 66 DHCP & HTML Configuration Ethernet Communications Modules, 3rd Edition Rev B, 04/06 The Port Number and Unit ID are only used if the H0/H2/H4ECOM100 client is trying to communicate with . . .
. . . address. H0/H2/H4 ECOM100 Client Peer to Peer Configuration Page 6 DHCP & HTML Configuration 66 DHCP & HTML Configuration Ethernet Communications Modules, 3rd Edition Rev B, 04/06 The Port Number and Unit ID are only used if the H0/H2/H4ECOM100 client is trying to communicate with a MODBUS TCP/IP . . .
. . . H0/H2/H4 ECOM100 Client Peer to Peer Configuration Page 6 DHCP & HTML Configuration 66 DHCP & HTML Configuration Ethernet Communications Modules, 3rd Edition Rev B, 04/06 The Port Number and Unit ID are only used if the H0/H2/H4ECOM100 client is trying to communicate with a MODBUS TCP/IP server . . .
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