Vacon 20 CP/X, Руководство по применению

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Parameter description vacon • 46
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4
P2.2
TO
P2.4 P
RESET SPEED
1
TO
3
You can use the preset speed parameters to define certain frequency references in advance.
These references are then applied by activating/inactivating digital inputs connected to param-
eters P4.8 and P4.9 (binary code). The values of the preset speeds are automatically limited be-
tween the minimum and maximum frequencies.
P2.9 S
TART ACCELERATION TIME
A specific acceleration time from zero to minimum frequency is available (P2.9). Normal ac-
celeration time (P1.3) is active only in case power is from mains supply. Normal deceleration
time (P1.4) is active in mains supply and in case the external frequency reference is lowered
below the reference of maximum power. It is also active when start command falls and ramp-
ing stop is programmed (stop mode is anyway by coasting, when the output frequency is below
minimum).
Specific acceleration and deceleration time are used when power is from solar panels. They
are available as parameters in MPPT group, but it is suggested not to change them, unless
needed because of stability issues.
P2.14 C
ONTROL PLACE
2
Alternative Run and direction control. Activated by digital input defined in P4.14.
0: I/O terminals
1: Keypad
2: Fieldbus
P2.15 F
REQUENCY REFERENCE SOURCE
2
Alternative source of frequency reference. Activated by digital input defined in P4.15 or field-
bus.
0: Analogue input AI1
1: Analogue input AI2
2: PID reference
3: Not used
4: Keypad
5: Fieldbus
6: AI1+AI2
7: Max Frequency
Required action Activated frequency
B1 B0 Preset speed 1
B1 B0 Preset speed 2
B1 B0 Preset speed 3
Table 22. Selection of preset frequencies; = input activated