Pilz PMCprimo DriveP.01/AA0/4/0/0/208-480VAC - Manual (Page 212)

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9-1
9.1 Glossary
9 Appendix
9 9000 Appendix Appendix 9- 9.1 Glossary 9100 Glossary 9- ][Glossar
Absolute encoder Encoder that provides an absolute value for each position. The absolute
value corresponds directly to the position of the detected machine compo-
nent.
Brake chopper See brake resistor
Brake resistor Resistor that converts electrical energy into thermal energy, generated
when a motor is braked.
Common mode voltage Disturbance amplitude, which an analogue input (differential input) can cor-
rect.
Commutation Method of supplying power to the motor
Continuous output of brake re-
sistor
Mean power that can be converted within the brake resistor.
Current regulator Regulates the difference between the current setpoint and the actual value
to 0, output: Voltage setpoint.
Earth fault Electrical connection between a phase and PE
Enable Enable signal for the servo amplifier, hardware enable via 24 V signal, soft-
ware enable via the commissioning software, a fieldbus or permanently set.
Both are required for the enable.
Encoder Generic term for incremental encoder and absolute encoder. Optical or
magnetic transducer, which detects the current position of a motor shaft or
drive unit and converts it into an electrical signal.
Gray code Special form of binary representation, in which only one binary digit chang-
es from one code word to the next.
Holding brake Holds the position of the motor when the power is removed. May only be
used when the motor is at standstill.
I Effective value of continuous current
I
²
t threshold Monitoring the actual demand on effective current I
Incremental encoder Sensor for detecting linear or rotational positional changes. Path, speed
and direction can be determined by evaluating the number of pulses, pulse
frequency and phase position.
Intermediate circuit Smooths the still undulating, rectified supply voltage to the servo amplifier;
also used as an energy store (with feedback for example).