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Les langues disponibles
III
Status signal: speed reached
Relay energises (transistor output switched) when the current value is above the
switch point�
• If the input frequency decreases again, the relay switches back when the current
value is below the switch point - hysteresis (SP-HY)�
• The relay is de-energised during the start-up delay and as long as the input fre-
quency is smaller than the set switch point�
IV
Error signal: overspeed
Relay de-energises (transistor output open) when the current value is above the
switch point�
• If the input frequency decreases again, the relay switches back when the current
value is below the switch point - hysteresis (SP-HY)�
• The relay is energised during the start-up delay and as long as the input frequency
is smaller than the set switch point�
Switching function in combination with switch point, hysteresis and start-up delay (→ 7.5
Switching diagram)
7.2 Switch point (SP)
Value at which the output changes its switching status according to the switching function�
Value
according to the marking on the device, e�g� 0�1���10 Hz or 10���1000 Hz
(depending on the potentiometer position SPx1/SPx100)
7.3 Hysteresis
The hysteresis value determines the difference between the reset point and the switch
point SP�
If the distance between cams is not the same, different pulse sequence times are
measured� They may be alternately above or below the switch point so that the output
changes its switching status continuously and rapidly� This behaviour can be prevented by
increasing the hysteresis factor�
Value
1���100 %
UK
35
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