Omron CRT1 - 10-2009, Operation Manual

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584
Troubleshooting
Section 12-2
Slave Units with
Power Short-circuit
Detection Function The short-circuit detection sta-
tus does not turn OFF after a
power short-circuit has been
detected, even though the
error has been fixed. The status will not turn OFF
until the power for the node
where the error was detected
is reset. Cycle the communications
power after fixing the error.
Slave Units with
Unconnected Line
Detection Function The Unconnected Line Detec-
tion Status Flag turned ON for
an unused input. Unconnected line detection is
enabled for an unused input. Disable unconnected line
detection for that input.
The Unconnected Line Detec-
tion Status Flag turned ON
even though the sensor power
supply was connected. Current consumption is low.
(Output current: 3 mA max.) Disable unconnected line
detection for that input (so that
the unconnected line detec-
tion function does not operate.)
The short-circuit detection sta-
tus does not turn OFF after a
unconnected line has been
detected, even though the
error has been fixed. The status will not turn OFF
until the power for the node
where the error was detected
is reset. Cycle the communications
power after fixing the error.
Slave Units with Load
Short-circuit Detec-
tion Function The short-circuit detection sta-
tus does not turn OFF after a
load short-circuit has been
detected, even though the
error has been fixed. The status will not turn OFF
until the power for the node
where the error was detected
is reset. Cycle the communications
power after fixing the error.
Slaves with Discon-
nected Line Detec-
tion The Disconnected Line Detec-
tion Status Flag turned ON for
an unused output. Disconnected line detection is
enabled for an unused output. Disable disconnected line
detection for that output.
The Disconnected Line Detec-
tion Status Flag turned ON
even though the external load
was connected. Current consumption is low.
(Output current: 3 mA max.) Disable disconnected line
detection for that output (so
that the disconnected line
detection function does not
operate.)
The short-circuit detection sta-
tus does not turn OFF after a
load short-circuit has been
detected, even though the
error has been fixed. The status will not turn OFF
until the power for the node
where the error was detected
is reset. Cycle the communications
power after fixing the error.
Output Slave Units
with Continuous
Short-circuit Protec-
tion Circuit Communications are operat-
ing correctly, and the correct
area is ON, but the output and
the output indicator are not
ON. The output current exceeds the
rated output current, continu-
ous short-circuit protection
operates, and the outputs are
turned OFF. Once operation is
performed, all outputs remain
OFF until the power supply is
reset. Remove the cause of the error
and restart the communica-
tions power supply once oper-
ation has been recovered.
Model Problem Cause Possible correction