80
Self-Diagnosis Section 7-1
Non-fatal
Errors
Programming
Console LEDs
LEDs on Master LEDs on
Slave
Remote
Terminal LEDs
Cause Correction
TR/
ERR
TEST
OK
END
RS
CHK
LINE
ERR
TR/
ERR
ERR POWER TR/
ERR
REMOTE I/O
ERR
lit
not lit
lit not
lit
lit
not lit
lit lit Transmission line
broken.
Correct
transmission line.
lit
not lit
not
lit
not
lit
not
lit
not lit
not lit/lit
not
lit
CPU Unit error in
Slave or Remote
Terminal.
Replace Slave or
Remote Terminal.
lit
not lit
--- not
lit
lit lit lit lit Master or Slave
I/O bus error.
Check Slave I/O
units on Slave and
Rack.
not
lit
not lit
not
lit
not
lit
lit
not lit
lit lit CPU Unit error in
Master.
Replace Master.
lit
not lit
--- lit lit
not lit
lit lit Transmission line
shorted.
Correct
transmission line.
lit --- --- not
lit
not
lit
not lit
--- --- Power not
supplied to Slave.
Supply power to
Slave.
lit --- --- not
lit
--- ---
not lit
not
lit
Power not
supplied to
Remote Terminal.
Supply power to
Remote.
I/O VER ERR flash
not lit
not
lit
not
lit
flash not
lit
lit --- I/O Unit added to
or removed from
Master, Slave, or
Remote Terminal.
Check I/O table on
Programming
Console and
correct if
necessary. If I/O
table is Ok,
correct I/O
configuration.
flash
/not
lit
not lit
--- not
lit
lit litt lit lit Remote Terminal
using same word
as PC. Same
Slave unit number
or same Remote
Terminal word
number set twice.
Fatal
Errors
Programming
Console LEDs
LEDs on Master LEDs on
Slave
Remote
Terminal LEDs
Cause Correction
TR/
ERR
TEST
OK
END
RS
CHK
LINE
ERR
TR/
ERR
ERR POWER TR/
ERR
I/O SET ERR flash
/lit
not lit
--- not
lit
lit lit lit lit Input and Output
specifications are
incorrect for I/O
Units on Slave
Racks or for
Remote
Terminals.
Check I/O table on
Programming
Console and
correct if
necessary. If I/O
table is OK,
correct I/O Unit
configuration.
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