GE UR Series B30 Instruction Manual page 140

5.2 PRODUCT SETUP
these ports may be connected to a computer running EnerVista UR Setup. This software can download and upload setting
files, 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 be
set. This feature allows operation with hosts which hold the RS485 transmitter active for some time after
NOTE
each transmission.
c) NETWORK

PATH: SETTINGS PRODUCT SETUP
 NETWORK

These messages appear only if the B30 is ordered with an Ethernet card.
5
The IP addresses are used with the DNP, Modbus/TCP, IEC 61580, IEC 60870-5-104, TFTP, and HTTP protocols. The
NSAP 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 normally
be left at their default values, but may be changed if required (for example, to allow access to multiple UR-series relays
behind a router). By setting a different
map the relays to the same external IP address. The client software (EnerVista UR Setup, for example) must be configured
to 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, it
will not become active until power to the relay has been cycled (off-on).
NOTE
d) MODBUS PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 MODBUS PROTOCOL

The serial communication ports utilize the Modbus protocol, unless the port is configured for DNP or IEC 60870-5-104
operation. This allows the EnerVista UR Setup software to be used on the port. The UR operates as a Modbus slave device
only.
When using Modbus protocol on the RS232 port, the B30 responds regardless of the
grammed. For the RS485 port, each device on the serial bus must have a unique slave address from 1 to 254. Address 0
and addresses from 248 and up are reserved by the Modbus protocol specification, and so their use here is not recom-
mended. Address 0 is the broadcast address that all Modbus slave devices listen to. When
to 0, the UR accepts broadcast messages, but in compliance with protocol specifications for broadcast messages, never
replies. Addresses do not have to be sequential, but no two devices can have the same address or conflicts resulting in
errors occur. Generally, each device added to the link should use the next higher address starting at 1. When using Modbus
TCP/IP, the client must use the programmed
more information on the Modbus protocol.
5-16

COMMUNICATIONS
IP ADDRESS:
0.0.0.0
SUBNET IP MASK:
MESSAGE
0.0.0.0
GATEWAY IP ADDRESS:
MESSAGE
0.0.0.0
 OSI NETWORK
MESSAGE
 ADDRESS (NSAP)
ETHERNET OPERATION
MESSAGE
MODE: Full-Duplex
TCP/UDP PORT NUMBER

COMMUNICATIONS
MODBUS SLAVE
ADDRESS: 254
MODBUS TCP PORT
MESSAGE
NUMBER:
MODBUS SLAVE ADDRESS
B30 Bus Differential System

NETWORK
Range: Standard IP address format
Not shown if CPU Type E is ordered.
Range: Standard IP address format
Not shown if CPU Type E is ordered.
Range: Standard IP address format
Not shown if CPU Type E is ordered.
Range: Select to enter the
Not shown if CPU Type E is ordered.
Range: Half-Duplex, Full-Duplex
Not shown if CPU Type E or N is ordered.
for a given protocol on each UR-series relay, the router can

MODBUS PROTOCOL
Range: 1 to 254 in steps of 1
Range: 1 to 65535 in steps of 1
502
value in the Unit Identifier field. See Appendix B for
5 SETTINGS
OSI NETWORK ADDRESS
pro-
MODBUS SLAVE ADDRESS
is set
MODBUS SLAVE ADDRESS
GE Multilin
.