Instruction Manual

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SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20210405
Device Installation
SEL-451 Relay
PROTO= MBA*
SPEED = 38400
MBT = N
TX_ID = 2
TX MODE = P
STOPBIT = 2
RX_ID = 1
MBNUM = 8
* = MBA or MBB may be used
SEL-2505/SEL-2506 Remote I/O Module
SPEED = 38400
RX_ADD = 1
TX_ADD = 2
MIRRORED BITS Interface and Messages
The SEL-FR12 communicates with a host device (protective relay or recloser
control) through use of SEL M
IRRORED BITS communications. The connection
requires one serial port on the host device. The SEL-FR12 supports four port
speeds: 9.6, 19.2, 38.4, and 115.2 kbps. By default, the messages have the for-
mats listed in Table 7.
The default command set is ideal for applications where SEL-FT50 Fault Trans-
mitters are installed in trios and individual unit information is not needed. For
other applications, the SEL-FR12 supports two additional M
IRRORED BITS com-
mand sets.
The command sets listed in Table 9 and Table 10 provide conditional responses.
Program the SEL-651R logic to evaluate the expression RMB1 OR RMB2.
When true, the remaining bits RMB3–RMB8 contain FAULT data; otherwise,
they contain LINK data.
Table 8 defines the Trio FAULT and Trio LINK bits.
The TMB1–TMB6 entries in Table 9 and Table 10 indicate the required TMB
states to select the Default Set or Command Set 2 or 3. Any other bit combina-
tions force the SEL-FR12 to return all zeros and cause it to ignore TMB7 and
TMB8 commands.
Table 7 Default Command Set—SEL-FR12 MIRRORED BITS Data Message Contents
Required SEL-651R Transmit MIRRORED BITS (SELOGIC Equations) for Default Mode
TMB1 TMB2 TMB3 TMB4 TMB5 TMB6 TMB7 TMB8
000000
Clear link state
in SEL-FR12
Target reset on
SEL-FR12
HMI
SEL-651R Received MIRRORED BITS (Relay Word bits)
RMB1 RMB2 RMB3 RMB4 RMB5 RMB6 RMB RMB8
Trio 1 FAULT Trio 2 FAULT Trio 3 FAULT Trio 4 FAULT Trio 1 LINK Trio 2 LINK Trio 3 LINK Trio 4 LINK