Date Code 970103 Table of Contents i
SEL-251, -2, -3 Instruction Manual
TABLE OF CONTENTS
SECTION 3: COMMUNICATIONS 3-1
Introduction.................................................................................................................................. 3-1
Serial Port Connections and Configurations................................................................................ 3-1
Communications Protocol............................................................................................................ 3-3
Command Characteristics ............................................................................................................ 3-4
Startup .................................................................................................................................. 3-5
Command Format................................................................................................................. 3-6
Command Descriptions................................................................................................................ 3-6
Access Level 0 Command.................................................................................................... 3-6
ACCESS ....................................................................................................................... 3-6
Access Level 1 Commands................................................................................................... 3-7
2ACCESS ..................................................................................................................... 3-7
BREAKER.................................................................................................................... 3-7
BREAKER R................................................................................................................ 3-8
DATE mm/dd/yy .......................................................................................................... 3-8
EVENT n...................................................................................................................... 3-9
HISTORY..................................................................................................................... 3-9
IRIG ............................................................................................................................ 3-11
METER n.................................................................................................................... 3-12
METER D................................................................................................................... 3-13
METER RD................................................................................................................ 3-13
METER RP................................................................................................................. 3-14
QUIT........................................................................................................................... 3-14
SHOWSET n .............................................................................................................. 3-14
STATUS..................................................................................................................... 3-16
TARGET n k............................................................................................................... 3-16
TARGET R................................................................................................................. 3-18
TIME hh:mm:ss.......................................................................................................... 3-18
TRIGGER................................................................................................................... 3-18
Access Level 2 Commands................................................................................................. 3-19
CLOSE........................................................................................................................ 3-19
COPY m n................................................................................................................... 3-19
GROUP n.................................................................................................................... 3-20
OPEN.......................................................................................................................... 3-20
PASSWORD (1 or 2) password ................................................................................. 3-21
SET n p....................................................................................................................... 3-21
SET G p ...................................................................................................................... 3-27
SEL-251 Relay Command Summary ......................................................................................... 3-31
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