YOKOGAWA YTA710, User Manual

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<3. Parameter Setting>
3-6
IM 01C50T03-02EN
3.2.3 Process variable mapping
The YTA temperature transmitter can handle four
process variables: primary variable (PV), secondary
variable (SV), tertiary variable (TV), and quaternary
variable (QV).
These variables can be referred to as digital values
through the BRAIN protocol.
The PV value is processed for 4 to 20 mA output.
(→ 3.2.5 Range Setting)
Set Sensor1 and Sensor2 (for the 2-input model
only) before starting the process variable mapping.
(→ 3.2.2 Sensor Setup)
(1) Setting the mapping
The following explains the PV to QV setting.
Mapping means the assignment of PV to QV inputs.
Set the following parameters for mapping.
Variable Setting parameter
PV B10:PV is
SV B20:SV is
TV B30:TV is
QV B40:QV is
Select an input to be mapped as the mapping
destination from the following options.
Table 3.2 Mapping assignment list
Input Description 1-input
model
2-input
model Remarks
Sensor1 Sensor1
value
 
Sensor1-
Terminal
Temperature
difference
between
Sensor1 and
terminal block
 
Sensor1
must be a
temperature
sensor.
Terminal Terminal
block
temperature
 
Sensor2 Sensor2
value

Sensor2-
Terminal
Temperature
difference
between
Sensor2 and
terminal block

Sensor2
must be a
temperature
sensor.
Sensor1-
Sensor2
Difference
between
Sensor1 and
Sensor2

Sensor1
and
Sensor2
must be the
sensors to
measure
the same
physical
quantity.
Sensor2-
Sensor1
Difference
between
Sensor2 and
Sensor1

Same as
above
Input Description 1-input
model
2-input
model Remarks
Average Mean value
of Sensor1
and Sensor2

Same as
above
Sensor
Backup
Sensor
Backup (See
3.5.8 “Sensor
Backup
Function”.)

Same as
above
NOTE
An input related to Sensor2 cannot be selected for
the 1-input model.
NOTE
• When the user sets “Sensor1-Terminal”,
Sensor1 must already be set as a sensor
(thermocouple or resistance temperature
detector) to measure the temperature.
• When the user sets “Sensor2-Terminal”,
Sensor2 must already be set as a sensor
(thermocouple or resistance temperature
detector) to measure the temperature.
• When the user sets “Sensor1-Sensor2”,
“Sensor2-Sensor1”, “Average”, or “Sensor
Backup”, Sensor1 and Sensor2 must be able
to measure the same physical quantity (such as
same temperature, the same DC voltage, and
the same resistance).
If the above requirements are not satisfied, an
“AL.60 Illegal PV Cfg” alarm occurs.