GE G60 Instruction Manual page 206

PRODUCT SETUP
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 the EnerVista UR Setup software. This software can be used to
download and upload setting files, view measured parameters, and upgrade the relay firmware. A maximum of 32 relays
can be daisy-chained and connected to a distributed control system (DCS), power line carrier (PLC), or computer using the
RS485 port.
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. If COM2 is used for both a field ground module (GPM-F) and remote RTD unit (RRTD),
then the
RS482 COM2 BAUD RATE
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 that hold the RS485 transmitter active for some time after each transmission.
If the
COM2 USAGE
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 1200, 2400, 4800, 9600, or 19200 bps.
If the RS485 COM2 port is used for an RRTD, GPM-F, or RRTD and GPM-F, then there must not be any other devices
connected in the daisy-chain for any other purpose. The port is strictly dedicated to RRTD or GPM-F usage when
is selected as "RRTD only," "GPM-F only," or "RRTD & GPM-F."
USAGE
The field ground module (GPM-F) has a fixed slave address of 1. Therefore, the
only to the RRTD unit and has a setting rage of 2 to 254 if the
Cycle power to the G60 for changes to the
5
5.3.4.3 Ethernet network topology
The G60 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
operation 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)
Example 3 — Incorrect
IP1/Mask1: 10.1.1.2/255.0.0.0
IP2/Mask2: 10.2.1.2/255.0.0.0
IP3/Mask3: 10.3.1.2/255.0.0.0
This example is incorrect because the mask of 255.0.0.0 used for the three IP addresses makes them belong to the same
network of 10.x.x.x.
5-30
is fixed at 19200 bps.
setting is "RRTD only", then the COM2 port is used to monitor the RTDs on a remote RTD unit. The remote
RRTD SLAVE ADDRESS
is set as "RRTD & GPM-F."
COM2 USAGE
setting to take effect.
COM2 USAGE
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
COM2
setting is applicable