Glossary
C |
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 |
|
D |
DC-link (bus) voltage |
rectified and smoothed power voltage |
Disable |
removal of the ENABLE signal (0V or open) |
|
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 |
the enable signal for the servo amplifier (+24V) |
|
Earth short |
electrically conductive connection between a phase and PE |
|
F |
speed limit |
maximal value for the speed normalization at ±10V |
G |
GRAY-code |
a special way of representing binary numbers |
H |
Holding brake |
a brake in the motor, that can only be applied when the motor is at standstill |
I |
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 |
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Irms, r.m.s. current |
the r.m.s. value of a steady current |
|
K |
KP, P-gain |
proportional gain of a control loop |
L |
Limit-switch |
to limit the range of movement of the machine; implemented as an n.c. (break) contact |
M |
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 |
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Multi-axis system |
a machine with several independent drive axes |
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O |
Optocoupler |
optical connection between two electrically independent systems |
P |
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 |
|
R |
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 |
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ROD interface |
incremental position output |
|
S |
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 |
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SSI interface |
cyclically absolute, serial position output |
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Setp. ramps |
limiting of the rate of change of the speed setpoint value |
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T |
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 |
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Tn, integration time |
integral component of the control loop |
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Z |
Zero pulse/mark |
is produced by incremental encoders, once per turn, used to zero the machine |