Nord Drivesystems NORDAC FLEX SK 200E Series User Manual page 169

3 = - 10V – 10V: If a setpoint smaller than the programmed adjustment 0% (P402) is present, this
4 = 0 – 10V with Error 1, "0 – 10V with shut-down on Error 1":
5 = 0 – 10V m with Error 2 , "0 – 10V with switch-off on Error 2":
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can cause a change in direction rotation. This allows rotation direction reversal using a
simple voltage source and potentiometer.
E.g. internal setpoint with rotation direction change: P402 = 5 V, P104 = 0 Hz, Potentiometer
0-10 V  Rotation direction change at 5 V in mid-range setting of the potentiometer.
At the moment of reversal (hysteresis = ± P505), the drive stands still when the minimum
frequency (P104) is smaller than the absolute minimum frequency (P505). A brake that is
controlled by the FI will not have entered the hysteresis range.
If the minimum frequency (P104) is greater than the absolute minimum frequency (P505),
the drive reverses when the minimum frequency is reached. In the hysteresis range ± P104,
the FI supplies the minimum frequency (P104), the brake controlled by the FI is not applied.
NOTE: The function -10 V – 10 V is a description of the method of function and not a
reference to a bipolar signal (see example above).
If the value of the 0% adjustment in (P402) is undershot, the error message 12.8
"Undershoot of Analogue In Min." is activated.
If the value of the 100% adjustment in (P402) is undershot, the error message 12.9
"Undershoot of Analogue In Max." is activated.
Even if the analogue value is outside the limits defined in (P402) and (P403), the setpoint
value is limited to 0 - 100%.
The monitoring function only becomes active if an enable signal is present and the analogue
value has reached the valid range (≥(P402) or ≤(P403)) for the first time (e.g. pressure
build-up after switching on a pump).
Once the function has been activated, it also operates if the actuation takes place via a field
bus, for example, and the analogue input is not actuated at all.
See setting 4 ("0 - 10V with error switch off 1"), however:
In this setting the monitoring function only becomes active if an enable signal is present and
the time during which the error monitoring is suppressed has elapsed. This suppression time
is set in parameter (P216).
5 Parameter
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