GE Multilin L30 Line Current Differential System 5-251
5 SETTINGS 5.8 INPUTS AND OUTPUTS
5
b) DIRECT MESSAGES
Direct messages are used only between L30 relays connected directly using type 7 or type 2 digital communication cards.
These messages are transmitted every one-half of the power frequency cycle (10 ms for 50 Hz and 8.33 ms for 60 Hz) This
facility is of particular value for pilot schemes and transfer tripping. Direct messaging is available on both single channel
and dual channel communications modules. The inputs and outputs on communications channel 1 are numbered 1-1
through 1-8, and the inputs and outputs on communications channel 2 are numbered 2-1 through 2-8.
Settings associated with direct messages are automatically presented in accordance with the number of
channels provided in the communications module in a specific relay.
c) LOCAL DEVICES: DEVICE ID FOR TRANSMITTING GSSE MESSAGES
In a L30 relay, the device ID that represents the IEC 61850 GOOSE application ID (GoID) name string sent as part of each
GOOSE message is programmed in the
SETTINGS PRODUCT SETUP COMMUNICATIONS IEC 61850 PROTOCOL
GSSE/GOOSE CONFIGURATION TRANSMISSION FIXED GOOSE GOOSE ID setting.
Likewise, the device ID that represents the IEC 61850 GSSE application ID name string sent as part of each GSSE mes-
sage is programmed in the SETTINGS PRODUCT SETUP COMMUNICATIONS IEC 61850 PROTOCOL GSSE/GOOSE
CONFIGURATION TRANSMISSION GSSE GSSE ID setting.
In L30 releases previous to 5.0x, these name strings were represented by the RELAY NAME setting.
d) REMOTE DEVICES: ID OF DEVICE FOR RECEIVING GSSE/GOOSE MESSAGES
PATH: SETTINGS INPUTS/OUTPUTS REMOTE DEVICES REMOTE DEVICE 1(16)
Remote devices are available for setting purposes. A receiving relay must be programmed to capture messages from only
those originating remote devices of interest. This setting is used to select specific remote devices by entering (bottom row)
the exact identification (ID) assigned to those devices.
The REMOTE DEVICE 1 ETYPE APPID setting is only used with GOOSE messages; they are not applicable to GSSE mes-
sages. This setting identifies the Ethernet application identification in the GOOSE message. It should match the corre-
sponding settings on the sending device.
The
REMOTE DEVICE 1 DATASET setting provides for the choice of the L30 fixed (DNA/UserSt) dataset (that is, containing
DNA and UserSt bit pairs), or one of the configurable datasets.
Note that the dataset for the received data items must be made up of existing items in an existing logical node. For this rea-
son, logical node GGIO3 is instantiated to hold the incoming data items. GGIO3 is not necessary to make use of the
received data. The remote input data item mapping takes care of the mapping of the inputs to remote input FlexLogic oper-
ands. However, GGIO3 data can be read by IEC 61850 clients.
REMOTE DEVICE 1
REMOTE DEVICE 1 ID:
Remote Device 1
Range: up to 20 alphanumeric characters
MESSAGE
REMOTE DEVICE 1
ETYPE APPID: 0
Range: 0 to 16383 in steps of 1
MESSAGE
REMOTE DEVICE 1
DATASET: Fixed
Range: Fixed, GOOSE 1 through GOOSE 16
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