ACH550-01 User's Manual
116
Application macros and wiring
11. Dual setpoint PID
This application macro is intended for dual setpoint PI(D)
applications where process PI(D) controllers setpoint can be
changed to another value by activating digital input 3 (DI3).
Process PI(D) setpoints are set to the drive internally with
parameters 4011 (set 1) and 4111 (set 2).
When using a direct speed reference in the AUTO mode, the
speed reference must be connected to analogue 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 analogue input 2 (AI2). By default, the setpoint is set from the
control panel, but it can also be changed to analogue input 1.
Process PI(D) must be commissioned and adjusted with
parameters (
Group 40: PROCESS PID SET 1
) or using the PID
control assistant (recommended).
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