CHAPTER 5: SETTINGS
PRODUCT SETUP
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
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5.3.18 Direct inputs and outputs
5.3.18.1 Menu
SETTINGS
PRODUCT SETUP
DIRECT I/O
Direct inputs and outputs exchange status information (inputs and outputs) between UR-series relays connected directly
via type 7 digital communications cards. The mechanism is very similar to IEC 61850 GOOSE, except that communications
takes 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 both
ways around a ring configuration. On type 7 cards that support one channel, direct output messages are sent only in one
direction. 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 at
least every 1000 ms. Messages with state changes are sent within the main pass scanning the inputs and asserting the
outputs unless the communication channel bandwidth has been exceeded. Two self-tests are performed and signaled by
the following FlexLogic operands:
•
DIRECT RING BREAK
(direct input/output ring break). This FlexLogic operand indicates that direct output messages sent
from 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 output
messages 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 name
strings for direct inputs and outputs is the
DIRECT OUTPUT DEVICE ID
setting, which identifies the relay in all direct output
messages. All UR-series IEDs in a ring need to have unique numbers assigned. The IED ID is used to identify the sender of
the direct input and output message.
DIRECT I/O
DIRECT OUTPUTS
DEVICE ID: 1
Range: 1 to 16 in steps of 1
DIRECT I/O CH1 RING
CONFIGURATION: Yes
Range: Yes, No
DIRECT I/O CH2 RING
CONFIGURATION: Yes
Range: Yes, No
DIRECT I/O DATA
RATE: 64 kbps
Range: 64 kbps, 128 kbps
DIRECT I/O CHANNEL
CROSSOVER: Disabled
Range: Disabled, Enabled
CRC ALARM CH1
CRC ALARM CH2
UNRETURNED
MESSAGES ALARM CH1
UNRETURNED
MESSAGES ALARM CH2
This option is available when an Inter-Relay Communications card is specified at the time of ordering (see the
Order Code tables). With the option, direct inputs/outputs display by default. When you enable the
teleprotection feature, direct I/O is not visible.
Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive. As such, they cannot be used
simultaneously. Once teleprotection inputs and outputs are enabled, direct inputs and outputs are blocked, and
vice versa.