5-16 L30 Line Current Differential System GE Multilin5.2 PRODUCT SETUP 5 SETTINGS5these ports may be connected to a computer running EnerVista UR Setup. This software can download and upload settingfiles, view measured parameters, and upgrade the relay firmware. A maximum of 32 relays can be daisy-chained and con-nected to a DCS, PLC or PC using the RS485 ports.For each RS485 port, the minimum time before the port will transmit after receiving data from a host can beset. This feature allows operation with hosts which hold the RS485 transmitter active for some time aftereach transmission.c) NETWORKPATH: SETTINGS Ö PRODUCT SETUP ÖØ COMMUNICATIONS ÖØ NETWORKThese messages appear only if the L30 is ordered with an Ethernet card.The IP addresses are used with the DNP, Modbus/TCP, IEC 61580, IEC 60870-5-104, TFTP, and HTTP protocols. TheNSAP address is used with the IEC 61850 protocol over the OSI (CLNP/TP4) stack only. Each network protocol has a set-ting for the TCP/UDP port number. These settings are used only in advanced network configurations and should normallybe left at their default values, but may be changed if required (for example, to allow access to multiple UR-series relaysbehind a router). By setting a different TCP/UDP PORT NUMBER for a given protocol on each UR-series relay, the router canmap the relays to the same external IP address. The client software (EnerVista UR Setup, for example) must be configuredto use the correct port number if these settings are used.When the NSAP address, any TCP/UDP port number, or any user map setting (when used with DNP) is changed, itwill not become active until power to the relay has been cycled (off-on).Do not set more than one protocol to the same TCP/UDP PORT NUMBER, as this will result in unreliable opera-tion of those protocols.d) MODBUS PROTOCOLPATH: SETTINGS Ö PRODUCT SETUP ÖØ COMMUNICATIONS ÖØ MODBUS PROTOCOLThe serial communication ports utilize the Modbus protocol, unless configured for DNP or IEC 60870-5-104 operation (seedescriptions below). This allows the EnerVista UR Setup software to be used. The UR operates as a Modbus slave deviceonly. When using Modbus protocol on the RS232 port, the L30 will respond regardless of the MODBUS SLAVE ADDRESS pro-grammed. For the RS485 ports each L30 must have a unique address from 1 to 254. Address 0 is the broadcast addresswhich all Modbus slave devices listen to. Addresses do not have to be sequential, but no two devices can have the sameaddress or conflicts resulting in errors will occur. Generally, each device added to the link should use the next higheraddress starting at 1. Refer to Appendix B for more information on the Modbus protocol.Changes to the MODBUS TCP PORT NUMBER setting will not take effect until the L30 is restarted. NETWORKIP ADDRESS:0.0.0.0Range: Standard IP address formatNot shown if CPU Type E is ordered.MESSAGE SUBNET IP MASK:0.0.0.0Range: Standard IP address formatNot shown if CPU Type E is ordered.MESSAGE GATEWAY IP ADDRESS:0.0.0.0Range: Standard IP address formatNot shown if CPU Type E is ordered.MESSAGE OSI NETWORK ADDRESS (NSAP)Range: Select to enter the OSI NETWORK ADDRESS.Not shown if CPU Type E is ordered.MESSAGE ETHERNET OPERATIONMODE: Full-DuplexRange: Half-Duplex, Full-DuplexNot shown if CPU Type E or N is ordered. MODBUS PROTOCOLMODBUS SLAVEADDRESS: 254Range: 1 to 254 in steps of 1MESSAGE MODBUS TCP PORTNUMBER: 502Range: 1 to 65535 in steps of 1NOTENOTEWARNINGNOTE
