GE G60 Instruction Manual page 188

5.2 PRODUCT SETUP
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 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.
NOTE
If the setting is "RRTD only", then the COM2 port is used to monitor the RTDs on a remote RTD unit. The
COM2 USAGE
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, GPM-F, or RRTD and GPM-F, then there must not be any other devices con-
nected 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".
The field ground module (GPM-F) has a fixed slave address of 1. Therefore, the RRTD SLAVE ADDRESS setting is appli-
cable only to the RRTD unit and has a setting rage of 2 to 254 if the
Power must be cycled to the G60 for changes to the
NOTE
c) ETHERNET NETWORK TOPOLOGY
5
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 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)
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.
5-28
is fixed at 19200 bps.
COM2 USAGE
COM2 USAGE
G60 Generator Protection System
is set as "RRTD & GPM-F".
setting to take effect.
5 SETTINGS
COM2 USAGE
GE Multilin