GE L60 Instruction Manual page 148

5.2 PRODUCT SETUP
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 will be resent (forwarded) when it is determined that the message did not originate at
the receiver.
Direct output message timing is similar to GSSE 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:
5
1.
DIRECT RING BREAK
sent from a UR-series relay are not being received back by the relay.
2.
DIRECT DEVICE 1(16) OFF
at least one direct device are not being received.
Direct input/output settings are similar to remote input/output settings. The equivalent of the remote device name strings for
direct inputs/outputs is the
messages. All UR-series IEDs in a ring should have unique numbers assigned. The IED ID is used to identify the sender of
the direct input/output message.
If the direct input/output scheme is configured to operate in a ring (
messages should be received back. If not, the Direct Input/Output Ring Break self-test is triggered. The self-test error is sig-
naled by the
DIRECT RING BREAK
Select the
DIRECT I/O DATA RATE
the local relays configured with the 7A, 7B, 7C, 7D, 7H, 7I, 7J, 7K, 72 and 73 fiber optic communication cards may be set to
128 kbps. For local relays configured with all other communication cards (i.e. 7E, 7F, 7G, 7L, 7M, 7N, 7P, 7R, 7S, 7T, 7W,
74, 75, 76 and 77), the baud rate will be set to 64 kbps. All IEDs communicating over direct inputs/outputs must be set to
the same data rate. UR-series IEDs equipped with dual-channel communications cards apply the same data rate to both
channels. Delivery time for direct input/output messages is approximately 0.2 of a power system cycle at 128 kbps and 0.4
of a power system cycle at 64 kbps, per each 'bridge'.
The G.703 and RS422 modules are fixed at 64 kbps. The
these modules.
NOTE
The
DIRECT I/O CHANNEL CROSSOVER
over messages from channel 1 to channel 2. This places all UR-series IEDs into one direct input/output network regardless
of the physical media of the two communication channels.
The following application examples illustrate the basic concepts for direct input/output configuration. Please refer to the
Inputs/Outputs section in this chapter for information on configuring FlexLogic™ operands (flags, bits) to be exchanged.
EXAMPLE 1: EXTENDING THE INPUT/OUTPUT CAPABILITIES OF A UR-SERIES RELAY
Consider an application that requires additional quantities of digital inputs and/or output contacts and/or lines of program-
mable logic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series
IED, such as the C30, to satisfy the additional input/output and programmable logic requirements. The two IEDs are con-
nected via single-channel digital communication cards as shown in the figure below.
In the above application, the following settings should be applied:
5-46
(direct input/output ring break). This FlexLogic™ operand indicates that direct output messages
(direct device offline). This FlexLogic™ operand indicates that direct output messages from
DIRECT OUTPUT DEVICE ID
FlexLogic™ operand.
to match the data capabilities of the communications channel. Back-to-back connections of
setting applies to L60s with dual-channel communication cards and allows crossing
UR IED 1
UR IED 2
Figure 5–7: INPUT/OUTPUT EXTENSION VIA DIRECT INPUTS/OUTPUTS
L60 Line Phase Comparison Relay
. The
DIRECT OUTPUT DEVICE ID
DIRECT I/O RING CONFIGURATION
DIRECT I/O DATA RATE
TX1
RX1
TX1
RX1
842711A1.CDR
5 SETTINGS
identifies the relay in all direct output
: "Yes"), all direct output
setting is not applicable to
GE Multilin