ASCII Objekt-Reference 

 

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Glossary 


Clock 

clock signal 

 

Common-mode voltage 

the disturbance amplitude that can be compensated for by a differential analog input 

 

Continuous power of the regen circuit 

the average power that can be dissipated in the regen circuit 

 

Counts 

internal count pulses, 1 pulse = 1/220 turn-1 

 

Current controller 

regulates the difference between the current setpoint and the actual current to 0. Output: power-output voltage 

DC-link (bus) voltage 

rectified and smoothed power voltage 

 

Disable 

removal of the ENABLE signal (0V or open) 

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 

the enable signal for the servo amplifier (+24V) 

 

Earth short 

electrically conductive connection between a phase and PE 

speed limit 

maximal value for the speed normalization at ±10V 

GRAY-code 

a special way of representing binary numbers 

Holding brake 

a brake in the motor, that can only be applied when the motor is at standstill 

I²t threshold 

monitoring of the r.m.s. current that is actually drawn 

 

Incremental encoder interface 

position indication through 2 signals with a 90° phase difference, not an absolute position output 

 

Ipeak, peak current 

the r.m.s. value of the pulse current 

 

Irms, r.m.s. current 

the r.m.s. value of a steady current 

KP, P-gain 

proportional gain of a control loop 

Limit-switch 

to limit the range of movement of the machine; implemented as an n.c. (break) contact 

Machine 

the total assembly of parts or devices that are connected together, of which at least one is movable 

 

Monitor output 

output of an analog measurement 

 

Motion block 

a packet of data containing all the position parameters that are required for a motion task 

 

Multi-axis system 

a machine with several independent drive axes 

Optocoupler 

optical connection between two electrically independent systems 

P controller 

a control loop that has purely proportional response 

 

Phase shift 

compensation for the lag between the electromagnetic and the magnetic field in the motor 

 

PID controller 

control loop with proportional, integral and differential response 

 

PID-T2 

filter time constant for the speed controller output 

 

Position controller 

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

 

Pulse power of the regen circuit 

the maximum power that can be handled by the regen circuit 

RAM 

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

 

Regen circuit 

converts superfluous (regenerative) energy that is fed back by the motor, during braking, into heat in the regen resistor. 

 

Reset 

new start of the microprocessor 

 

Reversing mode 

operating with a periodic change of direction 

 

ROD interface 

incremental position output 

Servo amplifier 

an instrument for controlling the torque, speed and position of a servomotor  

 

Short-circuit 

here: electrically conductive connection between two phases 

 

Speed controller 

regulates the difference between the speed setpoint SW and the actual speed to 0. Output: current setpoint 

 

SSI interface 

cyclically absolute, serial position output 

 

Setp. ramps 

limiting of the rate of change of the speed setpoint value 

Tacho voltage 

a voltage proportional to the actual speed 

 

T-tacho, tacho time constant 

filter time constant in the speed feedback of the control loop 

 

Tn, integration time 

integral component of the control loop 

Zero pulse/mark 

is produced by incremental encoders, once per turn, used to zero the machine