GE T35 Instruction Manual page 152

5.2 PRODUCT SETUP
5
The T35 supports the Distributed Network Protocol (DNP) version 3.0. The T35 can be used as a DNP slave device con-
nected to multiple DNP masters (usually an RTU or a SCADA master station). Since the T35 maintains two sets of DNP
data change buffers and connection information, two DNP masters can actively communicate with the T35 at one time.
The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the IEC 60870-5-104 FUNCTION
setting is set to "Enabled", the DNP protocol will not be operational. When this setting is changed it will not become
NOTE
active until power to the relay has been cycled (off-to-on).
The DNP Channels sub-menu is shown below.

PATH: SETTINGS PRODUCT SETUP
 DNP CHANNELS

The
DNP CHANNEL 1 PORT
for each channel. Once DNP is assigned to a serial port, the Modbus protocol is disabled on that port. Note that COM1 can
be used only in non-Ethernet UR relays. When this setting is set to "Network - TCP", the DNP protocol can be used over
TCP/IP on channels 1 or 2. When this value is set to "Network - UDP", the DNP protocol can be used over UDP/IP on chan-
nel 1 only. Refer to Appendix E for additional information on the DNP protocol.
Changes to the DNP CHANNEL 1 PORT and DNP CHANNEL 2 PORT settings will take effect only after power has
been cycled to the relay.
NOTE
The
DNP NETWORK CLIENT ADDRESS
settings in this sub-menu are shown below.
5-18
DNP MESSAGE FRAGMENT
MESSAGE
SIZE: 240
DNP OBJECT 1
MESSAGE
DEFAULT VARIATION: 2
DNP OBJECT 2
MESSAGE
DEFAULT VARIATION: 2
DNP OBJECT 20
MESSAGE
DEFAULT VARIATION: 1
DNP OBJECT 21
MESSAGE
DEFAULT VARIATION: 1
DNP OBJECT 22
MESSAGE
DEFAULT VARIATION: 1
DNP OBJECT 23
MESSAGE
DEFAULT VARIATION: 2
DNP OBJECT 30
MESSAGE
DEFAULT VARIATION: 1
DNP OBJECT 32
MESSAGE
DEFAULT VARIATION: 1
DNP NUMBER OF PAIRED
MESSAGE
CONTROL POINTS: 0
DNP TCP CONNECTION
MESSAGE
TIMEOUT: 120 s

COMMUNICATIONS
DNP CHANNEL 1 PORT:
NETWORK
DNP CHANNEL 2 PORT:
MESSAGE
COM2 - RS485
and
DNP CHANNEL 2 PORT
settings can force the T35 to respond to a maximum of five specific DNP masters. The
T35 Transformer Protection System
Range: 30 to 2048 in steps of 1
Range: 1, 2
Range: 1, 2
Range: 1, 2, 5, 6
Range: 1, 2, 9, 10
Range: 1, 2, 5, 6
Range: 1, 2, 5, 6
Range: 1, 2, 3, 4, 5
Range: 1, 2, 3, 4, 5, 7
Range: 0 to 32 in steps of 1
Range: 10 to 300 s in steps of 1
 
DNP PROTOCOL DNP CHANNELS
Range: NONE, COM1 - RS485, COM2 - RS485,
FRONT PANEL - RS232, NETWORK - TCP,
NETWORK - UDP
Range: NONE, COM1 - RS485, COM2 - RS485,
FRONT PANEL - RS232, NETWORK - TCP,
NETWORK - UDP
settings select the communications port assigned to the DNP protocol
5 SETTINGS
GE Multilin