Agilent Technologies TV 1001 SEM Notice De Mode D'emploi page 255

Fault: this open collector output signal is ON when a system fault condition is
detected.
Programmable set point: this open collector output signal is enabled when the
reference quantity chosen (frequency, current or time) is higher than the set
threshold. The signal can be "high level active" (that is the output is normally at 0
Vdc and becomes 24 Vdc when activated), or "low level active" (that is the output
is normally at 24 Vdc and becomes 0 Vdc when activated). Moreover, if the
reference quantity is the frequency or the current drawn, it is possible to set the
hysteresis (in % of the threshold value) to avoid bouncing.
For example:
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Figure 20
The set point output stays at 0 Vdc until the frequency becomes higher than
505 Hz (that is 500 Hz + 1% of 500 Hz), then the output goes at 24 Vdc and
stays at 24 Vdc until the frequency be-comes lower than 495 Hz (that is 500 Hz
– 1% of 500 Hz).
It is possible to delay the set point checking for a programmable delay time.
The PROGRAMMABLE SET POINT signal has the following default settings:
TV 1001 SEM User Manual / 87-900-973-01 (H)
reference quantity: frequency
threshold: 500 Hz
hysteresis: 1%
activation type: "high level"
Set point output
Technical Information
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