Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 485

Troubleshooting
Model
Errors occurring in Ana-
log Slaves
464
Details
The Flag does not go ON even
though the monitor value
(threshold) has been
exceeded.
The expected input value (or
analog output value) is not
received even after changing
the input type, display mode,
and units settings.
The function does not operate
as expected even after chang-
ing data allocated to I/O data
and changing the function's
Enable Bit.
The analog data does not have
the expected value or there is a
large error in the analog value.
A disconnection (off-wire condi-
tion) is detected even though
the device is connected.
The DIP switch settings are
ineffective.
The user adjustment and bias
compensation settings are not
accepted (DRT2-TS04T only).
Probable cause
The function is not enabled for
the Analog Smart Slave.
If the monitor value is set to 0,
the Flag will always be OFF.
The input's decimal point posi-
tion was in the wrong place
when the monitor value was
set (DRT2-TS04@ only).
The new settings will not be
reflected without resetting the
Slave by turning the power
OFF and ON or resetting the
Slave from the Configurator.
I/O data is not allocated to the
function correctly.
Scaling is being performed.
The connected sensor does
not match the input type set-
ting.
There is a large error in the
user adjustment settings.
The following conditions apply
to Temperature Input Termi-
nals only:
The setting for the 1/100 dis-
play mode/normal display
mode is incorrect.
The sensor's decimal point
position was read incorrectly.
The following conditions apply
to the DRT2-TS04T only:
The Unit is mounted vertically
or face-down.
The Unit was replaced, but
the Terminal Block was not
changed. (The accuracy may
be reduced if the components
are not replaced as a set.)
Pin 8 of the DIP switch is OFF.
(This is the default setting.)
Adjustment was performed
with a input that was outside
of the acceptable setting
range.
Section 9-2
Remedy
Enable the desired function.
Set the monitor value to a
non-zero value.
Check the decimal point posi-
tion and enter the monitor
value again.
Either turn the Slave's power
OFF and ON or reset the
Slave from the Configurator.
Check that the analog data
format is correct and I/O data
is allocated correctly.
If scaling is being performed,
check whether the scaling val-
ues are correct.
If the scaling function has
been enabled inadvertently,
disable scaling.
Check the input type setting.
Perform the user adjustment
procedure again.
The following remedies apply
to Temperature Input Termi-
nals only:
In normal display mode, the
display value is multiplied by
× ×
1 or 10, depending on the
input type setting.
In 1/100 display mode, the
display value is multiplied by
×
100, regardless of the input
type setting. Check the set-
tings and input type again.
Check the Unit's mounting
direction.
Turn ON pin 8.
Perform the adjustment pro-
cedure again with the correct
input voltage (or current).
Check the adjustment system
and correct if necessary.