NORD Drivesystems BU0500 - Manual (Page 94)

SK 500E – Users Manual for Frequency Inverters
94 BU 0500 GB-1013
E.g. setpoint 4-20 mA: P402: Adjustment 0 % = 1 V; P403: Adjustment 100 % = 5 V; -
10 % corresponds to -0.4 V; i.e. 1...5 V (4...20 mA) normal operating zone, 0.6...1 V =
minimum frequency setpoint, below 0.6 V (2.4 mA) output switches off.
3 = - 10V – 10V: If a setpoint smaller than the programmed adjustment 0% (P402) is present,
this 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
à 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 physical bipolar signal (see example above).
4 = 0 – 10V with error 1, "0 – 10V with switch-off on error 1":
If the 0% adjustment value in (P402) is undershot, the error message 12.8 "Analog In Min
Undershot" is activated.
If the 100% adjustment value in (P402) is exceeded, the error message 12.9 "Analog In
Max Exceeded" is activated.
Even if the analog value is outside the limits defined in (P402) and (P403), the setpoint is
limited to 0 - 100%.
The monitoring function only becomes active if there is an enabling signal present and
the analog value
has reached the valid range (≥(P402) or ≤(P403)) for the first time
(example: build-up of pressure after a pump is switched on).
5 = 0 – 10V with error 2, "0 – 10V with switch-off on error 2":
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).
Pos : 181 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P400-P499/ Paramet er P402 – Abgleich Analogei ngang 1: 0% [SK 500. ..535E] @ 0\ mod_1327680931580_388.doc x @ 9188 @ @ 1
P402
Adjustment 1: 0%
(Analog input 1 adjustment: 0%)
S
-50.00 ... 50.00 V
{ 0.00 }
This parameter sets the voltage that should correspond with the minimum value of the selected
function for the analog input 1. In the factory setting (setpoint) this value is equivalent to the
setpoint set via P104 >Minimum frequency<.
Typical setpoints and corresponding settings:
0 – 10 V à 0.00 V
2 – 10 V à 2.00 V (monitored for function 0-10 V)
0 – 20 mA à 0.00 V (internal resistance approx. 250
W)
4 – 20 mA à 1.00 V (internal resistance approx. 250
W)
Pos : 183 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P400-P499/ Paramet er P403 – Abgleich Analogei ngang 1: 100% [SK 500 ... 535E] @ 0\ mod_1327681076340_388.doc x @ 9234 @ @ 1