Separate Pi Function - Danfoss AK-PC 772A User Manual

Configuration - continued

Separate PI function

1. Select PI function
2. Select actual PI-function
Define the required names
3.
and values attached to the
function
70
In our example we do not use
this function, so the display
has been included for your
information only.
Capacity controller RS8HF102 © Danfoss 2017-07
3 - General PI Control
The function can be used for optional regulation.
Adjust for each regulation
• Show on overview
• Quick settings
Here is a list of suggestions for PI regulations:
• PI Name
• Control mode: Off, Manual or Auto
• Control type: P or PI
• External DI ctrl: Adjusted to On if there is an external switch
that can start/stop the regulation.
• Input type: Choose which signal the regulation shall receive:
Temperature, pressure, pressure converted to temperature,
, voltage signal, Tc, Pc, Ss, Sd etc.
• Reference: Either fixed or signal for the variable reference::
Choose between: : Non, temperature, pressure, pressure
converted to temperature, voltage signal, Tc, Pc, Ss, DI etc..
• Setpoint: If fixed reference is choosen
• Reading the total reference
• Output. Here you select the outlet function (PWM = pulse
width modulated (fx AKV valve)), Stepper signal for a step-
per motor or voltage signal.
• Alarm mode: Choose whether an alarm shall be attached to
the function. If it is set to ON, alarm texts and alarm limits
can be entered.
• Advanced ctrl. settings:
• Ref. X1, Y1 and X2,Y2: Points that define and limit the
variable reference
• PWM period time: Period during which the signal has
been on and off.
• Kp: Amplification factor
• Tn: Integration time
• Filter for reference: Duration for smooth changes to the
reference
• Max. error: Maximum permissible fault signal at which the
integrator remains in the regulation
• Min. control output: Lowest permitted output signal
• Max. control output: Maximum permitted output signal
• Start up time: Time at startup at which the output signal is
force-controlled
• Startup output: The output signal size at the startup time.
• Stop output signal. Size of the output signal when regula-
tion is off.
AK-PC 772A