CHAPTER 5: SETTINGS PRODUCT SETUPB30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-11755.3.17 Direct inputs and outputs5.3.17.1 MenuSETTINGS PRODUCT SETUP DIRECT I/ODirect inputs and outputs exchange status information (inputs and outputs) between UR-series relays connected directlyvia type 7 digital communications cards. The mechanism is very similar to IEC 61850 GOOSE, except that communicationstakes place over a non-switchable isolated network and is optimized for speed. On type 7 cards that support two channels,direct output messages are sent from both channels simultaneously. This effectively sends direct output messages bothways around a ring configuration. On type 7 cards that support one channel, direct output messages are sent only in onedirection. Messages are resent (forwarded) when it is determined that the message did not originate at the receiver.Direct output message timing is similar to GOOSE message timing. Integrity messages (with no state changes) are sent atleast every 1000 ms. Messages with state changes are sent within the main pass scanning the inputs and asserting theoutputs unless the communication channel bandwidth has been exceeded. Two self-tests are performed and signaled bythe following FlexLogic operands:• DIRECT RING BREAK (direct input/output ring break). This FlexLogic operand indicates that direct output messages sentfrom a UR-series relay are not being received back by the relay.• DIRECT DEVICE 1 OFF to DIRECT DEVICE 16 OFF (direct device offline). These FlexLogic operands indicate that direct outputmessages from at least one direct device are not being received.Direct input and output settings are similar to remote input and output settings. The equivalent of the remote device namestrings for direct inputs and outputs is the DIRECT OUTPUT DEVICE ID setting, which identifies the relay in all direct outputmessages. All UR-series IEDs in a ring need to have unique numbers assigned. The IED ID is used to identify the sender ofthe direct input and output message. DIRECT I/O DIRECT OUTPUTSDEVICE ID: 1Range: 1 to 16 in steps of 1 DIRECT I/O CH1 RINGCONFIGURATION: YesRange: Yes, No DIRECT I/O CH2 RINGCONFIGURATION: YesRange: Yes, No DIRECT I/O DATARATE: 64 kbpsRange: 64 kbps, 128 kbps DIRECT I/O CHANNELCROSSOVER: DisabledRange: Disabled, Enabled CRC ALARM CH1See page 5-122 CRC ALARM CH2 UNRETURNED MESSAGES ALARM CH1See page 5-123 UNRETURNED MESSAGES ALARM CH2This option is available when an Inter-Relay Communications card is specified at the time of ordering (see theOrder Code tables). With the option, direct inputs/outputs display by default. When you enable theteleprotection feature, direct I/O is not visible.Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive. As such, they cannot be usedsimultaneously. Once teleprotection inputs and outputs are enabled, direct inputs and outputs are blocked, andvice versa.
