10/05 AWB8230-1541GB
Motor control
99
Motor potentiometer
With the UP and DWN (down) signals, you can enter the reference
frequency using an electronic motor potentiometer.
X Because the terminal functions UP and DWN can be used only
when the frequency setpoint has been specified with PNU F001
or A020, you need to make sure that PNU A001 contains the
value 02.
X Configure one to 5 of the digital inputs 1 to as UP or DWN by
setting the corresponding PNU (C001 to CC005) to 27 (UP) or
28 (DWN).
Through the use of the input configured as UP, the frequency
setpoint set under PNU A020 is also increased or, with DWN,
reduced (a fig. 100).
The shortest permissible duration during which an UP or DWN
input must be active is 50 ms.
The current reference frequency is saved when parameter
PNU C101 contains the value 01. It remains in memory even in the
event of a power cut (POWER OFF).
The UP/DWN function is not available when jog mode has been
activated (with active JOG input) or when the frequency setpoint
definition is made through the analog input terminals.
The output frequency range for UP and DWN ranges from 0 Hz up
to the end frequency specified under PNU A04 (a section “End
frequency”, page 66).
To operate the electronic motor potentiometer through control
signal terminals, microswitch TM/PRG must be in its PRG position.
You can also use the electronic motor potentiometer function with
the arrow keys (Í and Ú) of keypad.
X In PNU A001 enter the value 02 and save your input with the
ENTER key.
X Select PNU A020 and press the PRG key to open it.
X Enable a direction of rotation for the Motor (for example with
the default settings by setting digital input 1 = FWD).
X With the arrow keys (Í and Ú), set the required frequency
value.
If you are using the keypad, you save the set reference frequency
with the ENTER key. PNU C101 is not used in this control mode.
The UP command accelerates the drive up to the limit value f
max
(PNU F001) at the acceleration ramp set with PNU F002.
The deceleration (DWN) down to 0 Hz takes place at the
deceleration ramp set with PNU F003.
Figure 99: Control using electronic motor potentiometer
UP
FWD
REV
P24123
DWN
4
Figure 100:Function chart for UP/DWN (acceleration/deceleration –
motor potentiometer)
f
o
: Output frequency
FWD/REV
UP
DWN
f
O
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