465
Troubleshooting Section 9-2
Errors occurring in Ana-
log Slaves (Input)
DRT2-AD04
DRT2-AD04H
DRT2-TS04@
The off-wire display will not go
away.
The sensor is disconnected.
The cold junction compensa-
tor has been removed (DRT2-
TS04T only).
The temperature is far outside
of the sensor’s measurement
temperature range.
The input type is incorrect for
the temperature being mea-
sured.
Fix the sensor disconnection.
Check the connected sensor,
input type setting, and tem-
perature range.
The off-wire display will not
appear.
With Analog Input Terminals,
the off-wire display will not
operate if the input is outside
of the 1 to 5 V range or 4 to 20
mA range.
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The Top/Valley Detection Tim-
ing Flag will not go ON.
The Top/Valley Count Over
Flag will not go ON (DRT2-
TS04T only).
The hysteresis setting is too
high.
The hysteresis setting is 0.
Adjust the hysteresis setting.
The Top/Valley Detection Tim-
ing Flags go ON too frequently.
The Top/Valley count is unex-
pectedly high (DRT2-TS04T
only).
The hysteresis setting is too
low.
Adjust the hysteresis setting.
Errors occurring in the
DRT2-AD04 Analog
Input Terminal only
The conversion cycle is too
long.
The number of AD conver-
sion points is set to the maxi-
mum (4 points).
The processing time is longer
for each additional function.
If there are unneeded inputs,
reduce the number of points.
If there are unused functions,
delete those functions.
Errors occurring in the
DRT2-DA02 Analog
Output Terminal only
The expected value is not held
when a communications error
occurs.
The output hold/clear setting
is incorrect.
Check the output hold/clear
setting.
Model Details Probable cause Remedy
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