Omron SmartSlice GRT1 Series - Page 319

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Troubleshooting by Unit Section 9-5
Analog Input Unit
GRT1-AD2
Disconnection is not indi-
cated.
The input range is not set to
1 to 5 V or 4 to 20 mA. Dis-
connection cannot be indi-
cated if the ranges are not 1
to 5 V or 4 to 20 mA.
Check whether the input ranges
are correct.
The Top/Valley Detection
Timing Flags do not turn ON.
The hysteresis value is too
large for the amount of input
change.
Decrease the value by matching
the absolute value of hysteresis
to the amount of change in input.
The hysteresis is 0. Set the hysteresis to a value
other than 0.
The top/valley function is not
enabled.
Enable the top/valley function.
(After making the setting, reset
the Unit using the Configurator or
to turn the Unit’s power OFF and
ON.)
The Top/Valley Detection
Timing Flags turn ON fre-
quently.
The hysteresis value is too
small for the amount of input
change.
Increase the value by matching
the absolute value of hysteresis
to the amount of change in input.
The conversion cycle is long. Many processing functions
are being used. Processing
time is increased each with
each additional function.
Disable any unused functions and
execute conversion.
Analog Output Units
GRT1-DA2V
GRT1-DA2C
The expected value is not
held when a communications
error or slice bus error occurs.
Output value settings at
communications errors are
incorrect.
Check the details of the output
value settings at errors again.
Temperature Input Unit
(GRT1-TS2@)
Status does not turn ON even
if the monitoring set value is
exceeded.
• Relevant function is not
enabled.
• Status turns OFF regard-
less of other conditions
when monitoring set value
is 0.
• Monitoring set value was
set with an incorrect num-
ber of decimal places.
• Enable the corresponding func-
tion.
• Set the monitoring set value to a
value other than 0.
• Check the number of decimal
places and reset the set value.
• The expected temperature
input value cannot be
achieved even if the input
type, display mode, and
units are changed.
• Unit does not operate as
expected even if the data
allocated to the I/O, or the
function enable bit is
changed.
• The change will not be
reflected unless the Unit’s
power supply is turned OFF
and then ON or the Config-
urator is reset after the
change.
• Turn power supply OFF and
then ON or reset the Configura-
tor.
Model Details Probable cause Remedy