
ACH550 User's Manual
86 Wiring and applications
1. HVAC default
The factory set configuration of inputs and outputs in the
ACH550 drive is according to the following figure.
When using a direct speed reference in 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 HAND/
OFF mode, the speed reference and START command are
given through the control panel.
If process PI(D) is used, the feedback signal must be connected
to analog input 2 (AI2). Setpoint is set from the control panel as
default but it also can be changed to analog input 1. Process
PI(D) must be commissioned and adjusted with parameters
(Group 40) or using the PID control assistant (recommended).
00Template.book Page 86 Friday, January 2, 2004 2:55 PM
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