ABB ACS320 - Page 239

Actual signals and parameters 239
4025
WAKE-UP DEV
0.0 … 3276.7 0.1 0.0
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 UNITS and
4007 UNIT SCALE define the
units and scale.
• Parameter 4005 ERROR
VALUE INV = 0,
Wake-up level = Setpoint –
Wake-up deviation.
• Parameter 4005 ERROR
VALUE INV = 1,
Wake-up level = Setpoint +
Wake-up deviation.
• Wake-up level can be above or
below setpoint.
See the figure:
• C = Wake-up level when parameter 4005 ERROR VALUE INV = 1
• D = Wake-up level when parameter 4005 ERROR VALUE INV = 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
0.00 … 60.00 s 0.01 s 0.50 s
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.
•See 4023 PID SLEEP LEVEL above.
Group 40: Process PID set 1
Code Description Range Resolution Default S
Setpoint
C
D
t
E
F
4025
4026
4025
4026