ABB ACS550-01 - Page 126

126 ACS550 User’s Manual
Start-Up
4022 SLEEP SELECTION
Defines the control for the PID sleep function.
0 = NOT SEL– Disables the PID sleep control function.
1 = DI1 – Defines digital input DI1 as the control for the PID sleep function.
• Activating the digital input activates the sleep function.
• De-activating the digital input restores PID control.
2…6 = DI2…DI6 – Defines digital input DI2…DI6 as the control for the PID sleep function.
•See DI1 above.
7 = INTERNAL – Defines the output rpm/frequency, process reference, and process actual value as the control for the
PID sleep function. Refer to parameters 4025
WAKE-UP DEV and 4023 PID SLEEP LEVEL.
-1 = DI1(INV) – Defines an inverted digital input DI1 as the control for the PID sleep function.
• De-activating the digital input activates the sleep function.
• Activating the digital input restores PID control.
-2…-6 = DI2(INV)…DI6(INV) – Defines an inverted digital input DI2…DI6 as the control for the PID sleep function.
•See DI1(INV) above.
4023 PID SLEEP LEVEL
Sets the motor speed / frequency that enables the PID sleep
function – a motor speed / frequency below this level, for at least
the time period 4024
PID SLEEP DELAY enables the PID sleep
function (stopping the drive).
• Requires 4022 = 7 INTERNAL.
• See figure: A = PID output level; B = PID process feedback.
4024 PID SLEEP DELAY
Sets the time delay for the PID sleep function – a motor speed /
frequency below 4023
PID SLEEP LEVEL for at least this time period
enables the PID sleep function (stopping the drive).
• See 4023 PID SLEEP LEVEL above.
4025 WAKE-UP DEVIATION
Defines the wake-up deviation – a deviation from the setpoint
greater than this value, for at least the time period 4026
WAKE-UP
DELAY, re-starts the PID controller.
• Parameters 4006 and 4007 define the units and scale.
• Parameter 4005 = 0,
Wake-up level = Setpoint - Wake-up deviation.
• Parameter 4005 = 1,
Wake-up level = Setpoint + Wake-up deviation.
• Wake-up level can be above or below setpoint.
See figures:
• C = Wake-up level when parameter 4005 = 1
• D = Wake-up level when parameter 4005 = 0
• E = Feedback is above wake-up level and lasts longer than 4026
WAKE-UP DELAY – PID function wakes up.
• F = Feedback is below wake-up level and lasts longer than 4026
WAKE-UP DELAY – PID function wakes up.
4026 WAKE-UP DELAY
Defines the wake-up delay – a deviation from the setpoint greater
than 4025
WAKE-UP DEVIATION, for at least this time period, re-starts
the PID controller.
Code Description
Start
t < P 4024
t
t > P 4024
t
Stop
P 4023
P 4025
P 4026
Setpoint
A
B
P 4025
Setpoint
P 4025
C
D
t
}
}
4005 = 1
4005 = 0
P 4025
Setpoint
P 4025
C
D
t
P 4026
E
F
P 4026