5–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
VIRTUAL OUTPUTS CHAPTER 5: STATUS
Virtual Outputs
Path: Status > Virtual Outputs
The state of all virtual outputs is shown here, see next figure. The value for each Virtual
Output is shown on the control panel graphically as a toggle switch in either the On (|) state
or the Off (O) state.
Figure 5-6: Status of Virtual Outputs
Flex State
The selected Flex state parameter is available for status monitoring and the Modbus
memory map, when the selected operand is asserted.
Path: Status > Flex States
There are 256 Flex state bits available. The status value indicates the state of the given Flex
state bit.
Communications
GOOSE Rx and Tx
The 850 supports 3 GOOSE transmissions and 8 GOOSE receptions each with 64 items per
transmission or reception. Non-structured GOOSE is supported. Each item within the
GOOSE message can be a digital or analog value. Messages are launched within one scan
of a digital point status change or an analog exceeding its deadband.
The 850 server supports a subset of the server features described in part 7.2 of the
IEC61850 standard.
GOOSE MESSAGING
As indicated above, the 850 supports 3 GOOSE transmissions and eight GOOSE receptions
as shown in the table below:
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