Glossary

B

Bode Plot

Resonance analysis function

C

Clock

Clock signal

Counts

Internal count pulses, 1 pulse = 1 / 2²⁰ turn^-1

Current controller

Regulates the difference between the current setpoint and the actual value to 0
Output : power output voltage

D

DC bus link

Rectified and smoothed power voltage

Disable

Removal of the ENABLE signal

E

EEPROM

electrically erasable memory in the servo amplifier, data that are stored in the EEPROM are not lost if the auxiliary voltage is switched off

Enable

Enable signal for the servo amplifier, Hardware-Enable with 24V signal to X3, Software-Enable command by setup Software, fieldbus or permanently set. Both are required for enabling the amplifier.

F

Fieldbus interface

CANopen, PROFIBUS, PROFINET, EtherCAT, SERCOS etc.

Final speed (limit speed)

Maximum value for the speed normalization at ±10 V

G

GRAY-code

Special format for representing binary numbers

H

Holding brake

Brake in the motor, that can only be used when the motor is at standstill

I

I²t threshold

Monitoring of the r.m.s. current that is actually required

Ipeak, peak current

The effective value of the peak current

Irms, effective current

The r.m.s. value of the continuous current

K

Kp, P-gain

Proportional gain of a control loop

L

Limit switch

Switch limiting the traverse path of the machine; implemented as n.c. (break) contact

M

Machine

The complete assembly of all connected parts or devices, of which at least one is movable

Monitor output

output of an analog measurement

Motion block

Data packet with all the position control parameters which are required for a motion task

P

P-controller

Control loop with purely proportional behavior

Phase shift

Compensation for the lag between the electromagnetic and magnetic fields in the motor

PID-controller

control loop with proportional, integral and differential response

Position controller

Regulates the difference between the position setpoint and the actual position to 0
Output: speed setpoint

R

RAM

Volatile memory in the servo amplifier. Data that are stored in the RAM are lost when the auxiliary voltage is switched off.

Reset

New start of the microprocessor

Reversing mode

Operation with a periodic change of direction

ROD-interface

Incremental position output

S

Servo amplifier

Control device for regulating the speed, torque and position of a servomotor

Setpoint ramps

Limits for the rate of change of the speed setpoint

Speed controller

Regulates the difference between the speed setpoint and the actual value to 0
Output : current setpoint

SSI-interface

Cyclically absolute, serial position output

T

Tn, I-integration time

Integral component of a control loop

Z

Zero pulse

Output once per turn from incremental encoder, used to zero the machine