30
8.3 CH2 Function Group
Not available for Timer spec or Potentiometer input spec.
Not available if Heating/Cooling control output is selected from the Block function (Console software).
To enter the CH2 function group, follow the procedures below.
(1)
Press the
key in the PV/SV display mode until the left characters appear.
(2)
Press the
key. CH2 input type will appear.
Character
Name, Function, Setting Range
Default Value
Input type
• Selects an input type.
Multi-range input: K (-200 to 1370
)
Infrared TC input: 180 to 250
If External setting input spec is selected from the Block function (Console software), and if
the
key is pressed after selecting an input type, the unit reverts to the PV/SV display mode.
•
Multi-range input
:
Selects an input type from thermocouple (10 types), RTD (2 types), DC current (2 types)
and DC voltage (4 type), and the unit
/ . See (Table 8.1-1) on p.24.
•
Infrared thermocouple (TC) input
:
Selects an input type from 8 types of Infrared thermocouple (RD-300 series, RD-401) and
the unit
/ . See (Table 8.1-2) on p.24.
Scaling high limit
• Sets Scaling high limit value.
Multi-range input: 1370
Infrared TC input: 500
• For thermocouple, RTD, Infrared TC inputs, this matches SV high limit value.
• Setting range: Scaling low limit to Input range high limit
[Note] If CH difference input is selected for Input 2 block (from the Block function of
Console software), set the scaling high limit to span value, and set the scaling
low limit to 0 (zero).
(e.g. 1) 1 to 5V DC input, 0 to 100
Scaling high limit: 100
Scaling low limit: 0
0
(Span: 100)
100
(e.g. 2) 1 to 5V DC input, -100 to 100
Scaling high limit: 200
Scaling low limit: 0
-100
(Span: 200)
100
Scaling low limit
• Sets Scaling low limit value.
Multi-range input: -200
Infrared TC input: -50
• For thermocouple, RTD, Infrared TC inputs, this matches SV low limit value.
• Setting range: Input range low limit to Scaling high limit
Decimal point place
No decimal point
• Selects decimal point place.
Available for DC current, voltage input
•
: No decimal point
: 1 digit after decimal point
: 2 digits after decimal point
: 3 digits after decimal point
PV filter time constant
0.0 sec
• Sets PV filter time constant.
If the value is set too large, it affects control results due to the delay of response.
• Setting range: 0.0 to 10.0 seconds
Sensor correction
0.0
• Sets the correction value for the sensor.
• Setting range: -100.0 to 100.0
( ),
DC voltage, current input: -1000 to 1000 (The placement of the decimal
point follows the selection.)
[Sensor correction function]
This corrects the input value from the sensor. When a sensor cannot be set at the exact
location where control is desired, temperatures measured by the sensor may deviate from
the temperature in the controlled location. When controlling with plural controllers,
sometimes the measured temperatures (input value) do not concur due to differences in
sensor accuracy or dispersion of load capacities. In such a case, the control can be set at
the desired temperature by adjusting the input value of sensors.
PV after sensor correction= Current PV+ (Sensor correction value)
(e.g.) When PV is 198
:
If sensor correction value is set to 2.0
, the PV will be 198+(2.0)=200.0
.
If sensor correction value is set to -2.0
, the PV will be 198+(-2.0)=196.0
.
