nord NORDAC PRO SK 511E Series - Page 117

5 Parameters
BU 0505 EN-3021 117
Value
Function
Description
08
Actual PID frequency
limited*
Like Function 3, Actual frequency PID, however the output frequency cannot fall below
the programmed minimum frequency value in Parameter P104.
(no change to rotation
direction)
09
Actual frequency PID
monitored*
Like Function 3, Actual frequency PID, however the FI switches the output frequency
off when the minimum frequency P104 is reached.
10
Servo mode
torque
In servo mode ((P300) = "1") the motor torque can be set or limited using this function.
Here the speed controller is switched off and a torque control is activated. The analog
input is then the source of the setpoint value. Above firmware version SW 2.0, this
function can be also be used with reduced control precision without serv
o mode or for
((P300) = "0").
11
Torque precontrol
A function which enables a value for the anticipated torque requirement to be entered
in the controller (interference factor switching). This function can be used to improve
the load take-up of lifting equipment with separate load detection.
12
Reserved
13
Multiplication
The setpoint is multiplied by the stated analog value. The analog value adjusted to
100% then corresponds to a multiplication factor of 1.
14
Actual value process
controller *
Activates the process controller, analog input 1 is connected to the actual value sensor
(compensator, air can, flow volume meter, etc.). The mode (0-10 V or 0/4-
20 mA) is set
in P401.
15
Process controller
setpoint *
as function 14, however the setpoint is specified (e.g. by a potentiometer). The actual
value must be specified using another input.
16
Process controller
precontrol *:
adds an adjustable additional setpoint after the process controller.
46
Setpoint Torque Process
controller
Process controller torque setpoint
48
Motor temperature
Motor temperature measurement with KTY-84, details in Section 0
53
d-correction F process
"Diameter correction for PID process controller frequency"
54
d-correction Torque
"Diameter correction of torque"
55
d-correction F + Torque
"Diameter correction for PID process controller frequency and torque"
*) further details process controller: P400 and
4.4.
**) The limits of these values are set by the parameters >Minimum frequency auxiliary setpoints< P410 and >Maximum frequency auxiliary
setpoints< P411.
Further analog functions (47/49/56/57/58) are only relevant for POSICON.
NOTE: overview of various setpoints: 8.2 "Process controller".
(please see chapter 8.7 "Standardisation of setpoint / target values")
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List of possible digital functions of the analog inputs
The analog inputs of the FI can also be parameterised to process digital signals. The digital functions
are set in parameter P420 [-08] or [-09].
If a digital function is assigned to an analog input, the analog function of the relevant input must be set
to {0} "Off" in order to prevent misinterpretation of the signals.
A detailed description of the digital functions can be found after parameter P420. The functions of the
digital inputs are identical to the digital functions of the analog inputs.
Permissible voltage when using digital functions: 7.5...30 V.
NOTE:
The analog inputs with digital functions do not comply with EN61131-2 (Type 1 digital inputs), because
the idling currents are too low.
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