NAiS KT7, Instruction Manual

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AT bias setting
•
Set bias value during PID auto-tuning.
• Not available if DC voltage or current input is selected
in the Input type selection and when action is not PID, either.
• Setting range: 0 to 50 (0 to 100 ) or
0.0 to 50.0 (0.0 to 100.0 )
20
Controller/ Converter function selection
•
Selects controller or converter function.
• This setting item is indicated only when the control output
is DC current output type.
• Controller function :
Converter function :
Controller
function
Output status selection when input burnout
•
Selects whether the OUT output is turned OFF or not when
DC input is overscale or underscale.
• Available only for DC current output type with DC input.
• (Output OFF) (Output ON)
Output OFF
Sensor correction function
This corrects the input value from the sensor. When a sensor cannot be set at a location where
control is desired, the sensor measuring temperature may deviate from the temperature in the
controlled location. When controlling with plural controllers, the accuracy of sensors affects the
control. Therefore, sometimes the measured temperature (input value) does not concur with the
same setting value. In such a case, the control can be set at the desired temperature by adjusting
the input value of sensors.
Loop break alarm
The alarm will be activated when the process variable (PV) does not rise to the span within
the time it takes to assess the Loop break alarm after the manipulated variable has reached
100% or the output high limit value.
The alarm will also be activated when the process variable (PV) does not
fall to the span within
the time it takes to assess the Loop break alarm after the manipulated variable has reached
0% or the output low limit value.
When the control action is Direct (Cooling), read “
fall ” for “ rise ” and vice versa.
Energized/Deenergized function
When [alarm action energized] is selected, the alarm output (between terminals 8-9) is
conducted (ON) while the alarm output indicator is lit.
The alarm output is not conducted (OFF) while the alarm output indicator is not lit.
When [alarm action deenergized] is selected, the alarm output (between terminals 8-9) is not
conducted (OFF) while the alarm output indicator is lit.
The alarm output is conducted (ON) while the alarm output indicator is not lit.
OFF
ON
A1 hysteresis
SV setting + A1 setting point
OFF
ON
SV setting
+ A1 setting point
A1 hysteresis
High
limit alarm (When Energized is set) High limit alarm (When Deenergized is
set)
(Fig. 5.5-1)
(Fig. 5.5-2)