ABB ACH550-01 User Manual page 114

8. Internal timer
This application macro is for applications where the motor is
started and stopped with a built-in timer. This macro has also a
boost function which operates the motor after digital input 3
(DI3) has been momentarily activated. An example of the timer
usage is shown below. For further information see chapter
time clock and timed
When using a direct speed reference in the AUTO mode, the
speed reference must be connected to analog input 1 (AI1) and
the START command is given with digital input 1 (DI1). In the
HAND/OFF mode, the speed reference and START command
are given through the control panel (operator keypad).
If process PI(D) is used, the feedback signal must be connected
to analog input 2 (AI2). By default, the setpoint is set from the
control panel, but it can also be changed to analog input 1.
Process PI(D) must be commissioned and adjusted with
parameters
control assistant (recommended).
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functions.
(Group 40: PROCESS PID SET
Time Time period 2
period
1
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ACH550 User's Manual
1) or using the PID
Time
period
3
Time
period
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Application macros and wiring
Real-