<3. Parameter Setting >
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IM 01C50T01-02EN
NOTE
• When “Sensor1-Sensor2”, “Sensor2-
Sensor1”, “Average”, “Sensor1-Terminal”, or
“Sensor2-Terminal” is selected, the sensor
types to be set for Sensor1 and Sensor2
should be selected from any one of the
following three groups; Temperature sensor
(T/C and RTD), DC voltage or resistance.
The combination (for example, temperature
sensor and DC voltage input) would cause
an incorrect computation due to the different
unit system and is not allowed.
• When “Sensor1-Terminal” or “Sensor2-
Terminal” is selected, Temperature sensor
should be set for Sensor1 or Sensor2.
3.4.3 Unit
The unit for PV is set at the factory before
shipment. When Sensor1 (or Sensor2) or Terminal
temperature is mapped as PV, SV, TV or QV, the
unit that is selected for Sensor1 (or Sensor2) or
Terminal temperature is automatically referred as a
unit for these process variables. (See 3.4.1 Sensor
Configuration) When PV, SV, TV, or QV unit is set ,
the unit is set the sensor value unit mapped PV, SV,
TV, or QV automatically.
• Procedure to call up the display.
Device setup → Process variables → Device
Variables
→ Sensor1 → Sns1 Unit
→ Sensor2 → Sns2 Unit
→ Terminal → Term Unit
Set the Unit
• Procedure to call up the display.
Device setup → Process variables → Dynamic
Variable → PV (SV, TV or QV)
Set the Unit
When process variable is mV input, unit is
automatically selected mV and ohm input, unit
is automatically selected ohm.
NOTE
When PVis is changed from Sensor1 to Sensor2,
PV unit is automatically changed from Sensor1
unit to Sensor2 unit.
3.4.4 PV Range
The range for PV corresponding to the 4 to 20mA
output signal is set at the factory before shipment.
Followings are the procedures to change the range.
(1) Changing the range with Keypad – LRV,
URV –
Setting LRV and URV
• Procedure to call up the display
Device setup → Basic setup → PV Basic
Setup → PV Re-range → Range values
Set the LRV and URV.
NOTE
It is possible to set LRV>URV.
This setting reverses the 4 to 20 mA output
signal.
Setting Conditions:
LSL ≤ LRV ≤ USL
LSL ≤ URV ≤ USL
|URV – LRV| ≥ Recommended Min. span
(2) Changing the range while applying an
actual input – Apply values –
a) Procedure to call up the display
Device setup → Basic setup → PV Basic
Setup → PV Re-range → Apply values
b) Apply the input corresponds to 4 mA.
c) After obtaining stable input, determine the 4 mA
output.
d) Select 20 mA and set same as 4mA setting.
3.4.5 Damping Time Constant
(1) Setting the device variable damping
Setting the response time of each process variable
makes it very slowly with a rapid change in input.
Set the value from 0 to 100 seconds. If the time
constant is set to 2 seconds, transmitter calculates
a reading every cycle time using the damping
equation, to make the output 63 percent of the input
range after 2 seconds.
This damping time constant is normally set to work
when the temperature makes a step change within
2 percent of the output range. Following are the
procedures to change the damping time constant of
Sensor1.
