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GE C70 Instruction Manual
Also see for C70: Communications manualCommunications guideInstruction manualInstruction manualInstruction manual
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GE Multilin C70 Capacitor Bank Protection and Control System 5-2515 SETTINGS 5.8 INPUTS AND OUTPUTS5OUTPUT H1a OPERATE: “ VO1 ”OUTPUT H1a RESET: “ VO2 ”5.8.4 VIRTUAL OUTPUTSPATH: SETTINGS INPUTS/OUTPUTS VIRTUAL OUTPUTS VIRTUAL OUTPUT 1(96)There are 96 virtual outputs that may be assigned via FlexLogic. If not assigned, the output will be forced to ‘OFF’ (Logic 0).An ID may be assigned to each virtual output. Virtual outputs are resolved in each pass through the evaluation of the Flex-Logic equations. Any change of state of a virtual output can be logged as an event if programmed to do so.For example, if Virtual Output 1 is the trip signal from FlexLogic and the trip relay is used to signal events, the settingswould be programmed as follows:VIRTUAL OUTPUT 1 ID: "Trip"VIRTUAL OUTPUT 1 EVENTS: "Disabled"5.8.5 REMOTE DEVICESa) REMOTE INPUTS/OUTPUTS OVERVIEWRemote inputs and outputs provide a means of exchanging digital state information between Ethernet-networked devices.The IEC 61850 GSSE (Generic Substation State Event) and GOOSE (Generic Object Oriented Substation Event) stan-dards are used.The sharing of digital point state information between GSSE/GOOSE equipped relays is essentially an extension to Flex-Logic, allowing distributed FlexLogic by making operands available to/from devices on a common communications net-work. In addition to digital point states, GSSE/GOOSE messages identify the originator of the message and provide otherinformation required by the communication specification. All devices listen to network messages and capture data only frommessages that have originated in selected devices.IEC 61850 GSSE messages are compatible with UCA GOOSE messages and contain a fixed set of digital points. IEC61850 GOOSE messages can, in general, contain any configurable data items. When used by the remote input/output fea-ture, IEC 61850 GOOSE messages contain the same data as GSSE messages.Both GSSE and GOOSE messages are designed to be short, reliable, and high priority. GOOSE messages have additionaladvantages over GSSE messages due to their support of VLAN (virtual LAN) and Ethernet priority tagging functionality.The GSSE message structure contains space for 128 bit pairs representing digital point state information. The IEC 61850specification provides 32 “DNA” bit pairs that represent the state of two pre-defined events and 30 user-defined events. Allremaining bit pairs are “UserSt” bit pairs, which are status bits representing user-definable events. The C70 implementationprovides 32 of the 96 available UserSt bit pairs.The IEC 61850 specification includes features that are used to cope with the loss of communication between transmittingand receiving devices. Each transmitting device will send a GSSE/GOOSE message upon a successful power-up, whenthe state of any included point changes, or after a specified interval (the default update time) if a change-of-state has notoccurred. The transmitting device also sends a ‘hold time’ which is set greater than four times the programmed default timerequired by the receiving device.Receiving devices are constantly monitoring the communications network for messages they require, as recognized by theidentification of the originating device carried in the message. Messages received from remote devices include the mes-sage time allowed to live. The receiving relay sets a timer assigned to the originating device to this time interval, and if ithas not received another message from this device at time-out, the remote device is declared to be non-communicating, soit will use the programmed default state for all points from that specific remote device. If a message is received from aremote device before the time allowed to live expires, all points for that device are updated to the states contained in themessage and the hold timer is restarted. The status of a remote device, where “Offline” indicates non-communicating, canbe displayed.The remote input/output facility provides for 32 remote inputs and 64 remote outputs. VIRTUAL OUTPUT 1VIRTUAL OUTPUT 1 IDVirt Op 1Range: Up to 12 alphanumeric charactersMESSAGE VIRTUAL OUTPUT 1EVENTS: DisabledRange: Disabled, Enabled |
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