C.12
SEL-751 Relay Instruction Manual Date Code 20170927
SEL Communications Processors
SEL Communications Processor Example
Setting the SEL Communications Processor
The Unsolicited Write message string \W;06:USER:0000h;20,03:USER:0000h/
contains all the information necessary to send the remote analog data to the
SEL-751. Following is a discussion on the elements of the Unsolicited Write
message string.
➤ \W; indicates this is an Unsolicited Write Message
➤ 06:User:0000H indicates where the data are stored in the SEL
communications processor (06 is the User regions port number
where the data are stored, the beginning of the User region
starts at F800H on each port, 0000H indicates what register in
the User region to start at).
➤ ;20 indicates how many 16-bit registers from the SEL
communications processor User region to send.
➤ ,03:USER: is an SEL communications processor Unsolicited
Write message compatibility requirement. 03 is the SEL
communications processor port the SEL-751 is connected and
the second parameter should always be USER, or F800h.
*>>SET A 3 <Enter>
Automatic message settings for Port 3
Save Unsolicited Messages (Y/N) AUTOBUF = Y ? <Enter>
Port Startup String
STARTUP ="?"
? <Enter>
Enable Automatic Sequential Events Recorder Collection (Y/N)REC_SER = N ? <Enter>
Block external connections to this port
NOCONN = NA
? <Enter>
Auto-message Settings
How many auto-message sequences (0-12) MSG_CNT = 0 ? 1 <Enter>
Item 1 trigger D1
ISSUE1 = NA
? R1 <Enter>
Item 1 message
MESG1 = ""
? \W;06:USER:0000h;20,03:USER:0000h/ <Enter>
Archive Settings
Enable use of archive data items (Y/N) ARCH_EN = N ? END <Enter>
AUTOBUF = Y
STARTUP ="?"
REC_SER = N
NOCONN = NA
MSG_CNT = 1
ISSUE1 = R1
MESG1 = "\W;06:USER:0000h;20,03:USER:0000h/"
ARCH_EN = N
USER = 0
Save changes (Y/N) ? Y <Enter>
Port 3 Settings Changed
*>>
Figure C.5 Unsolicited Write Settings
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