5-28 T60 Transformer Protection System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
PATH: SETTINGS PRODUCT SETUP COMMUNICATIONS SERIAL PORTS
It is important that the baud rate and parity settings agree with the settings used on the computer or other equipment that is
connected to these ports.
The RS485 port can be connected to a computer running EnerVista UR Setup. This software can download and upload set-
ting files, view measured parameters, and upgrade the relay firmware. A maximum of 32 relays can be daisy-chained and
connected to a DCS, PLC or PC using the RS485 ports.
The baud rate for standard RS485 communications can be selected as 300, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 33600, 38400, 57600, or 115200 bps.
For the RS485 port, the minimum time before the port transmits 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 each transmission.
If the COM2 USAGE setting is “RRTD”, then the COM2 port is used to monitor the RTDs on a remote RTD unit. The remote
RTD unit uses the Modbus RTU protocol over RS485. The RRTD device must have a unique address from 1 to 254. The
baud rate for RRTD communications can be selected as 300, 1200, 2400, 4800, 9600, 14400, or 19200 bps.
If the RS485 COM2 port is used for an RRTD, then there must not be any other devices connected in the daisy-chain for
any other purpose. The port is strictly dedicated to RRTD usage when
COM2 USAGE is selected as “RRTD”.
Power must be cycled to the T60 for changes to the COM2 USAGE setting to take effect.
c) ETHERNET NETWORK TOPOLOGY
The T60 has three Ethernet ports. Each Ethernet port must belong to a different network or subnetwork. Configure the IP
address and subnet to ensure that each port meets this requirement. Two subnets are different when the bitwise AND oper-
ation performed between their respective IP address and mask produces a different result. Communication becomes
unpredictable when more than one port is configured to the same subnet.
Example 1
IP1/Mask1: 10.1.1.2/255.255.255.0 (where LAN 1 is 10.1.1.x/255.255.255.0)
IP2/Mask2: 10.2.1.2/255.255.255.0 (where LAN2 is 10.2.1.x/255.255.255.0)
IP3/Mask3: 10.3.1.2/255.255.255.0 (where LAN3 is 10.3.1.x/255.255.255.0)
Example 2
IP1/Mask1: 10.1.1.2/255.0.0.0 (where LAN1 is 10.x.x.x/255.0.0.0)
IP2/Mask2: 11.1.1.2/255.0.0.0 (where LAN2 is 11.x.x.x/255.0.0.0)
IP3/Mask3: 12.1.1.2/255.0.0.0 (where LAN3 is 12.x.x.x/255.0.0.0)
SERIAL PORTS
COM2 USAGE:
RS485
Range: RS485, RRTD
MESSAGE
RRTD SLAVE ADDRESS:
254
Range: 1 to 254 in steps of 1. Shown only if the COM2
USAGE setting is “RRTD”.
MESSAGE
RS485 COM2 BAUD
RATE: 19200
Range: 300, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 33600, 38400, 57600, 115200. Shown
only if the COM2 USAGE is setting is “RS485”.
MESSAGE
RRTD BAUD RATE:
19200
Range: 1200, 2400, 4800, 9600, 19200. Shown only if
the COM2 USAGE is setting is “RRTD”.
MESSAGE
RS485 COM2 PARITY:
None
Range: None, Odd, Even.
MESSAGE
RS485 COM2 RESPONSE
MIN TIME: 0 ms
Range: 0 to 1000 ms in steps of 10.
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