Speed window

  • Menu: 4.6.1-4

Description

Reference signal for monitoring whether the speed is within a defined speed range. The speed range is defined by the user.

The following parameters define when a reference signal is set or revoked:

  • Window center – Actual speed value that is defined as the center of the speed window. The window center is considered in terms of the value and applies to both directions of movement.
  •  Half window width – Value with which the width of the speed window is calculated using the formula window center ± half window width. The window width is considered in terms of the value and applies to both directions of movement.
  • Delay time – The condition for setting the reference signal must be fulfilled for at least the duration of the delay time.
  • Signal – Setting at which the reference signal is set.

v0

Speed value in the middle of the window

v1

Lower limit of the speed window (middle of the window - half window width)

v2

Upper limit of the speed window (middle of the window + half window width)

Δt

Delay time

F1

Polarity: Value within window

F2

Polarity: Value out of window

Following is an explanation of how to set/reset the reference signal for the polarity Value within window (F1):

If the actual speed exceeds one of the limits of the speed window, the delay time starts to elapse.

  • If the actual speed is still within the speed window for the duration of the delay time, the reference signal is set after the delay time has elapsed (time t1).
  • If the actual speed is outside the speed window for the duration of the delay time, the reference signal is revoked after the delay time has elapsed (time t2).
  • If the actual speed passes the limit of the speed window again before the delay time has elapsed, the reference signal is not changed (time t3).