Nord Drivesystems SK 750E-751-323-A - Parameterisation; Control Terminals

NORDAC SK 750E Manual
98 Technical design subject to change BU 0750 GB
Parameter
Setting value / Description / Note
Parameter
set
Available with option
P418
Analog 1 outp. func.
P
STD
MLT
0 ... 52
[ 0 ]
Analogue functions:
An analogue voltage (0 ... +10 volt) can be picked off at the control terminals (5mA max.). A number
of functions are available. For all of these the following is invariably true:
0 volt of analogue voltage always correspond to 0% of the selected value.
10 volts always corresponds to the nominal motor value (if not stated otherwise) multiplied by the
P419 scaling factor, as for instance:
100%
P419value motor Nominal
10Volt
0 = OFF, no output signal at the terminals
1 = Current frequency, the analogue voltage is proportional to the frequency at the FI output
2 = Speed, is the synchronous speed calculated by the FI on the basis of the setpoint effective
at the time. Load-dependent speed fluctuations are not taken into account. When the servo
mode has been selected, this function is used to read out the measured speed.
3 = Current, is the effective value of the output current supplied by the inverter.
4 = Torque current, indicates the load torque of the motor computed by the inverter (100% =
P112)
5 = Voltage, is the output voltage supplied by the inverter.
6 = D.C. link voltage, is the direct voltage in the frequency inverter. There is no relation be-
tween the d.c. voltage and nominal motor data. Based on a scaling of 100%, 10 volts are
equivalent to 450 volt d.c. (230V of mains power) or 850V d.c. (480V of mains power) re-
spectively!
7 = Value of P542, parameter P542 can be used to assign a function to the analogue output ir-
respective of the current operating status of the frequency inverter. With bus control for in-
stance this function can be used (parameter command) to obtain an analogue value from
the control system via the frequency inverter.
8 = Apparent power, is the current apparent power of the motor calculated by the inverter.
9 = Effective power, is the current effective power calculated by the inverter.
10 = Torque [%], is the current torque calculated by the inverter.
11 = Field [%], is the strength of the magnetic field in the motor as calculated by the inverter at
any particular moment.
12 = Current frequency ±, the analogue voltage is proportional to the output frequency of the
inverter, with the zero point being shifted to 5V. When the phase sequence is clockwise,
values are supplied in a range between 5V and 10V, and when the phase sequence is anti-
clockwise, values are supplied in a range between 5V and 0V.
13 = Speed ±, is the synchronous speed calculated by the inverter on the basis of the setpoint
effective at the time, with the zero point being shifted to 5V. When the phase sequence is
clockwise, signals are supplied in a range between 5V and 10V, and when the phase se-
quence is anticlockwise, signals are supplied in a range between 5V and 0V. When the
servo mode is active, this function is used to read out the measured speed.
14 = Torque [%] ±, is the current torque calculated by the inverter, with the zero point being
shifted to 5V. With torques from powered operation, signals are supplied in a range be-
tween 5V and 10V, and with torques from regenerative operation, signals are supplied in
the range betwen 5V and 0V.
30 = Set freq. befor ramp, indicates the frequency resulting from the intervention of any control-
lers (ISD, PID) connected on line side. This will be the setpoint frequency for the power sec-
tion after it has been adapted via the acceleration or deceleration ramp (P102, P103) re-
spectively.
31 = Bus-transmitted value, the analogue output is controlled via a bus system. The process
data are transmitted directly (P546, P547, P548).
... continued on the next page