GE G30 Instruction Manual page 167

5 SETTINGS
MESSAGE
b) SERIAL PORTS

PATH: SETTINGS PRODUCT SETUP
 SERIAL PORTS

MESSAGE
MESSAGE
and
RS485 COM2 BAUD RATE PARITY
RS232 port is intended for local use and is fixed at 19200 bit/s baud and even parity. The rear COM2 port is RS485 and has
settings for baud rate and parity. It is important that these parameters agree with the settings used on the computer or other
equipment that is connected to these ports. Any of these ports can 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 connected to a DCS, PLC, or computer using the RS485 ports. If IEC
60870-103 is chosen as the protocol, valid baud rates are 9600 and 19200 bit/s, and valid parity is Even.
RS485 COM2 RESPONSE MIN TIME
ing data from a host. This feature allows operation with hosts that hold the RS485 transmitter active for some time after
each transmission.
c) ETHERNET NETWORK TOPOLOGY
The G30 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.
GE Multilin
 IEC103
 PROTOCOL
 
COMMUNICATIONS SERIAL PORTS
RS485 COM2 BAUD RATE:
19200
RS485 COM2 PARITY:
Even
RS485 COM2 RESPONSE
MIN TIME: 0 ms
: The G30 is equipped with two independent serial communication ports. The faceplate
: This setting specifies the minimum time before the rear RS485 port transmits after receiv-
G30 Generator Protection System
5.2 PRODUCT SETUP
See page 5–60.
Range: 300, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 33600, 38400, 57600, 115200 bit/s
Range: None, Odd, Even
Range: 0 to 1000 ms in steps of 10
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