IM 01C50B01-01E
3-2
3. PART NAMES AND FUNCTIONS
3.2 Setting the Hardware Error
Burnout Change-over Switch
The temperature transmitter is equipped with a hard-
ware error burnout function used to set the output
direction upon hardware error, and a sensor burnout
function that sets the direction of the output in the
event of burnout of the temperature sensor. When
factory-shipped under normal conditions, the output of
both hardware error burnout and sensor burnout are set
to HIGH, but if suffix code /C1 is specified, the
hardware error burnout is set to LOW (-5%) output,
and sensor burnout is set to LOW (-2.5%) output,
respectively. The setting of the direction of output from
burnout can be changed.
To change the direction of output arising from burnout,
switch the setting pin on the CPU assembly (see Figure
3.1 and Table 3.1). To change the direction of output
arising out of sensor burnout, a dedicated hand-held
terminal is required to rewrite the parameters within
the transmitter. For details, refer to the separate
instruction manual, IM 01C50T01-01E “HART
Protocol” or IM 01C50T03-01E “BRAIN Protocol”.
Table 3.1 Output Direction Setting Pins for Hardware
Error Burnout
T0301.EPS
H
L
H
L
Pin
position
RemarkHardware error
burnout
direction
HIGH
LOW
110% or more
(21.6 mA DC)
-5% or less
(3.2 mA DC)
Set to HIGH upon
shipment from the
factory
Set to LOW when
suffix code /C1
is provided
Hardware error
burnout
output
3.3 Built-in Indicator Display
Function
F0302.EPS
Output bar chart display
Communication protocol display
Operation mode
display
Display of sensor type and
number of wire connections
Unit display
Process variable display
Input display
Figure 3.2 Built-in Indicator Display Function
(1)Output bar chart display
The output value is displayed in a bar chart. Resolution
of the bar chart is to the extent of 32 divisions (each
increment is about 3.125%). If the output exceeds 0%
or 100%,䉲 is lit. The bar chart can be toggled ON/
OFF using the bar chart display parameter.
(2) Communication protocol display
The indicator is on in accordance with each communi-
cation protocol.
(3)Operation mode display
Lit when each operation mode is activated.
M.D.:Lit when the multidrop mode of HART commu-
nication specification is activated.
B.M.: Lit during burst mode transfer of HART commu-
nication specification.
F.O.: Lit when manual mode is active.
W.P.: Lit when write protect status is active.
(4)Input display
Indicates the type of input in accordance with the value
shown in the column in Item (5).
Sns1: Meant to show the process variable allocated to
Sensor 1.
Sns2: Meant to show the process variable allocated to
Sensor 2. (Can be displayed only with the
YTA320.) .
Term:Meant to show the temperature of the terminal
box of the temperature transmitter.
Avg: Meant to show the average of the process
variable allocated to Sensor1 and Sensor2. (Can
be displayed only with the YTA320.).
Dif: Meant to show the difference of the process
variable allocated to Sensor1 and Sensor2. (Can
be displayed only with the YTA320.)
(5)Process variable display
Displays the process variable or output value. The
value is displayed down to the second decimal position
if the integer part is less than three digits, or down to
the first decimal position if the integer part is 4 digits.
If the value is negative, the minus (⫺) sign is lit. For
process variables, the indicators for each item specified
in the column of input display in Item (4) and the unit
column in Item (6) are lit. For output value, % or mA
in the unit column in Item (6) is lit. When burnout of
the temperature sensor is identified, or the temperature
transmitter is found abnormal, an error code flashes.
For a list of error codes, refer to “Error code table” in
Section 6.4.
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