ABB ACS550 User Manual page 165

ACS550 User's Manual
Code Description
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
function (stopping the drive).
• Requires 4022 = 7 (
• See the 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
enables the PID sleep function (stopping the drive).
• See 4023
PID SLEEP LEVEL
4025 WAKE-UP DEV
Defines the wake-up deviation – a deviation from the setpoint
greater than this value, for at least the time period 4026
, re-starts the PID controller.
DELAY
• 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 the 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
- – PID function wakes up.
WAKE UP DELAY
• F = Feedback is below wake-up level and lasts longer than 4026
- – PID function wakes up.
WAKE UP DELAY
4026 WAKE-UP DELAY
Defines the wake-up delay – a deviation from the setpoint greater
than 4025 -
WAKE UP DEV
PID controller.
enables the PID sleep
PID SLEEP DELAY
).
INTERNAL
for at least this time period
PID SLEEP LEVEL
above.
, for at least this time period, re-starts the
P 4023
Setpoint
-
WAKE UP
Setpoint
P 4025
Setpoint
P 4025
A
t < P 4024
t > P 4024
B
P 4026
P 4025
Stop
Start
C
}
4005 = 1
P 4025
}
4005 = 0
P 4025
D
E
P 4026
P 4026
F
Parameters
165
t
t
t
C
D
t