Chapter 6 – Parameters
ACH 500 Programming Manual
6-5
AI1/JOYST
Reference from analog input 1 configured for a joystick. Analog input
minimum signal is full speed reverse, and analog input maximum signal is full
speed forward. The mid point between minimum and maximum is zero speed.
CAUTION: Minimum reference for joystick must be 0.3 V/0.6 mA or
greater. If a 0 – 10 V or 0 – 20 mA signal is used, the drive will run at fmax to
Reverse if the control signal is lost. Set Parameter 10.5.1 (Minimum AI1) to
2 V/4 mA or to a value 0.3 V/0.6 mA or greater, and Parameter 30.1.2 (AI <
Min Function) to Fault, and the drive will stop in case of lost control signal.
Figure 6-2 shows Joystick control.
Figure 6-2
Joystick Control
DI3U,4D(R)
Speed reference via digital inputs as Floating Point Control, or Motor
Operated Potentiometer Control. DI3 increases speed, and DI4 decreases
speed. (R) indicates that the reference will reset to minimum frequency when
stop command is given. The rate of change of the reference signal is
controlled by parameter 20.3.5, ACCEL TIME 2.
DI3U,4D
Same as above except speed reference does not reset to zero on stop
command.
DI5U,6D
Same as above.
3 EXT REF1 MINIMUM
0 Hz – 500 Hz (ACH 501)
0 Hz – 120 Hz (ACH 502)
This parameter sets the frequency corresponding to the minimum reference.
When Parameter 20.1.1 (Minimum Frequency) is changed, this parameter is
automatically set to the same value.
Freq Max Limit
f
out
Freq Min Limit
0
Freq Min Limit
Freq Max Limit
Max
Mid
Min
= Output Frequency
= Ref 1
f
ref
