Omron GRT1 - 11-2007 Operation Manual page 319

Troubleshooting by Unit
Analog I/O Units and
Temperature Input
Units
Model
Analog I/O Units The status flag does not turn
ON even when the monitor
GRT1-AD2
value is exceeded.
GRT1-DA2V
GRT1-DA2C
• The analog input value is not
• Unit does not operate as
• The analog data is not as
• Disconnection is detected
The input range or output
range cannot be changed with
the external switch.
User adjustment is not
accepted.
Functions cannot be set using
the Configurator.
298
Details
as expected even when the
input type, display mode, or
unit is changed. Alterna-
tively, the analog output is
not output as expected.
expected even if the data
allocated to the I/O or the
function enable bit is
changed.
expected or the error in the
analog data is large.
even though there is no dis-
connection (GRT1-AD2
only).
Probable cause
• The relevant Smart function
is not enabled.
• The Status Flags will be
OFF unconditionally if the
monitor value is 0.
The new settings will not be
reflected without resetting
the Unit by turning the Unit's
power OFF and ON or reset-
ting the Unit from the Config-
urator.
The functions are not cor-
rectly allocated to the I/O
data.
Scaling is performed.
User adjustment error is
large.
The input range setting is
incorrect.
SW4 is turned OFF (default). Turn SW4 ON.
An attempt has been made
to perform adjustment with
input that is outside the set-
ting range.
SW4 is turned ON.
Section 9-5
Remedy
• Enable the relevant function.
• Set the monitor setting to a
value other than 0.
Either turn the Unit's power OFF
and ON or reset the Unit from the
Configurator.
Check again whether the type of
analog data to be set is correct
and allocation to I/O data is per-
formed.
• If scaling is performed, check
again whether the scaled value
is correct.
• Turn scaling OFF if it is mistak-
enly turned ON.
Perform user adjustment again.
The ranges for detecting discon-
nection are 1 to 5 V and 4 to
20 mA. Check whether the input
ranges are correct.
• Input the correct input voltage
(current) and perform adjust-
ment again.
• Review the adjustment system
again.
Turn SW4 OFF.