Schweitzer Engineering Laboratories SEL-311C - Page 731

J.7
Date Code 20060320 Instruction Manual SEL-311C Relay
MIRRORED BITS Communications
Settings
Mirrored Bits transmit identifier(1-4) TXID = 1 ?
Mirrored Bits receive identifier(1-4) RXID = 2 ?
Set the RXID of the local relay to match the TXID of the remote relay. For
example, in the three-terminal case, where Relay X transmits to Relay Y,
Relay Y transmits to Relay Z, and Relay Z transmits to Relay X:
Mirrored Bits receive default state (string of 1s, 0s or Xs)
87654321
RXDFLT=00000X11
?
Use the RXDFLT setting to determine the default state the MIRRORED BITS
should use in place of received data if an error condition is detected. The
setting is a mask of 1s, 0s and/or Xs, for RMB1A–RMB8A, where X
represents the most recently received valid value.
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB1PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB1DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB2PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB2DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB3PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB3DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB4PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB4DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB5PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB5DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB6PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB6DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB7PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB7DO= 1 ?
Mirrored Bits RMB_ Debounce PU msgs (1-8) RMB8PU= 1 ?
Mirrored Bits RMB_ Debounce DO msgs (1-8) RMB8DO= 1 ?
Supervise the transfer of received data (or default data) to RMB1A–RMB8A
with the M
IRRORED BITS pickup and dropout security counters. Set the pickup
and dropout counters individually for each bit.
Use the MBGA and MBGB settings for applications, such as bus transfer
schemes, that require M
IRRORED BITS settings to reside in the Group settings.
The affected settings include the M
IRRORED BITS transmit identifier (TXID)
and receive identifier (RXID), which are moved from the Port settings to the
Group settings. Moving these settings allows them to be changed with a group
switch, allowing for the communications flexibility required by specific
applications.
In addition, when PROTO is set to MBGA or MBGB, M
IRRORED BITS can be
enabled or disabled on a group-by-group basis, minimizing nuisance
communications alarms. Set M
IRRORED BITS Enable setting EMBA or EMBB
to Y in order to enable M
IRRORED BITS communication for that group.
TXID RXID
Relay X 1 3
Relay Y 2 1
Relay Z 3 2