Communications; Rs485; Wifi - GE 845 Instruction Manual

DEVICE

Communications

RS485

WiFi

4–24
Event Record
CLEAR_EVENT_RECORDS,
ORIGIN, TIMESTAMP:
CLEAR_TRANSIENT_RECORDS,
ORIGIN, TIMESTAMP:
CLEAR_FAULT_REPORTS,
ORIGIN, TIMESTAMP:
FLEXLOGIC OPERANDS
The following operands are added for CyberSentry.
CyberSentry Flexlogic Operand
AUTHENTICATION FAIL
UNAUTH SETTING CHANGE ATTEMPT
RADIUS SRV UNAVAILABLE
The 845 has a two-stage communications capability. The base CPU supports Modbus
protocol through the Ethernet, USB, serial and WiFi port. In addition, the base CPU also
supports IEC 103, DNP serial, and TFTP protocol. Once the communications module option
is added to the base, the base Ethernet port becomes disabled but the two Ethernet ports
on the communications module have enhanced communications capabilities such as
IEC61850, IEC62439 parallel redundancy protocol and IEEE 1588 Precision Time Protocol.
The communications CPU also supports Modbus TCP, IEC 104, DNP TCP, TFTP, SFTP, and
SNTP protocol.
On the rear card the 845 is equipped with one RS485 serial communication port and one
10/100 Mbps Ethernet port. The RS485 port has settings for baud rate and parity. It is
important that these parameters agree with the settings used on the computer or other
equipment connected to this port. A maximum of 32 relays can be daisy-chained and
connected to a DCS, PLC or a PC using the RS485 port.
Path:
Setpoints > Device > Communications > RS485
BAUD RATE
Range: 9600, 19200, 38400, 57600, 115200
Default: 115200
PARITY
Range: None, Odd, Even
Default: None
PORT PROTOCOL
Range: Modbus, DNP 3.0, IEC 60870-5-103
Default: Modbus
WiFi refers to Wireless Local Area Networks (WLANs) that are based on the 802.11 set of
standards. WLANs are essentially providing Local Area Network (LAN) type of connectivity
but without the need of cables, which makes them more convenient for use in limited
spaces. WiFi works on top of the TCP/IP stack, the same as Ethernet. The signal strength
and its range is determined by the wireless device's antenna technology and standard, the
best being IEEE 802.11n.
Level Description
Warning (4) Clear event records command was issued.
Notice (5) Clear transient records command was
issued.
Notice (5) Clear fault reports command was issued.
Description
Operand set for Failed Authentication self test and
alarm
Operand set for unauthorized setting change action
Operand set for RADIUS servers unavailable self test
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS