Technical data

II.4.2 Current controller
I , root mean square current [A]
Sets the desired rms output current.
I
, peak current [A]
Sets the desired peak output current (rms value) according to requirements.
I t threshold, signal threshold [%]
Monitors the actual rms current required.
Kp, P-gain [-]
Determines the proportional gain of the current controller.
Tn, integration time [ms]
Determines the integration time constant / integral-action time of the current controller.
II.4.3 Speed controller
K , P-gain [-]
Determines the proportional gain (also known as AC-gain).
T , integration time [ms]
Determines the integration time constant / integral-action time.
PID-T2, second time constant [ms]
Influences the P-gain at medium frequencies.
SW offset [mV]
For the offset compensation of CNC controls and the analog input.
SW ramp + [ms]
Delays the rate of rise of the setpoint value during acceleration.
SW ramp – [ms]
Delays the rate of fall of the setpoint value during braking.
Speed limit [min
]
Determines the normalization of the actual value for speed.DC monitor [-]
Selects the output of IDC- or VTA-monitor at terminal X3/23.
Limit switch, Stop [-]
The limit switch inputs can be activated or deactivated together or individually.
The Stop function enables a controlled, drift-free standstill with the standstill torque.
Start Phi, phase shift [min
]
Compensates the inductive phase shift between motor current and motor voltage.
Limit Phi, phase shift [°electr.]
The phase shift is increased linearly between the start speed and the final speed up to
the final value of Phi.
T tacho, tachometer time constant [ms]
Influences the speed feedback by a low-pass response.
Speed steadiness [-]
Improves the smooth running qualities for drive aplications with a constant speed.
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Chapter II Installation and commissioning Page II - 17
digifas™ 7100 series 01.98