ABB RDNA-01 Instrukcja Użytkownika Strona 171

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ACS550-01/U1 User’s Manual 171
Parameters
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 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
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 DEV
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 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
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 DEV, for at least this time period, re-starts the
PID controller.
Code Description
Start
t < P 4024
t > P 4024
Stop
P 4023
P 4025
P 4026
Setpoint
A
B
t
t
P 4025
Setpoint
P 4025
C
D
}
}
4005 = 1
4005 = 0
t
P 4025
Setpoint
P 4025
C
D
P 4026
E
F
P 4026
t
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