28
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
M
IRRORED
B
ITS
Interface and Messages
The SEL-FR12 communicates with a host device (protective relay or recloser
control) through use of SEL M
IRRORED
B
ITS
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
B
ITS
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 M
IRRORED
B
ITS
Data Message Contents
Required SEL-651R Transmit M
IRRORED
B
ITS
(SEL
OGIC
Equations) for Default Mode
TMB1
TMB2
TMB3
TMB4
TMB5
TMB6
TMB7
TMB8
0
0
0
0
0
0
Clear link state
in SEL-FR12
Target reset on
SEL-FR12
HMI
SEL-651R Received M
IRRORED
B
ITS
(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
