Dual Setpoint Pid With Constant Speeds - ABB ACH550-01 User Manual

12. Dual setpoint PID with constant speeds

This application macro can be used for applications with two
constant speeds, active PID and alternating PID between two
setpoints using digital inputs. When using a transmitter, the
signal can be used as the process actual value for the PID
controller (AI2) or as a direct speed reference (AI1).
PID setpoints are set to the drive internally with parameters 4011
(set 1) and 4111 (set 2) and they can be changed with DI3. PID
can be commissioned and adjusted with parameters or with the
PID assistant (recommended).
Digital input (DI2) has a factory set control location EXT1/EXT2
selection function. When digital input is active, the control
location is EXT2 and PID is activated.
Digital inputs 4 (DI4) and 5 (DI5) have factory set constant
speed 1 and 2 functions. Constant speed 1 (par. 1202) is
selected by activating digital input 4 (DI4) and constant speed 2
(par. 1203) by activating digital input 5 (DI5).
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ACH550-01 User's Manual
Application macros and wiring