ABB DriveIT ACH550-UH - Page 121

ACH550-UH User’s Manual 121
Start-Up
4025 WAKE-UP DEVIATION 0.0…1000% 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 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 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 DEVIATION, for at least this time period, re-starts the PID
controller.
• See 4023
PID SLEEP LEVEL above.
4027 PID 1 PARAM SET -6…11 1 0
Defines how selections are made between PID Set 1 and PID Set 2.
PID parameter set selection. When set 1 is selected, parameters 4001…4026 are used.
When set 2 is selected, parameters 4101…4126 are used.
0 =
SET 1 – PID Set 1 (parameters 4001…4026) is active.
1 =
DI1 – Defines digital input DI1 as the control for PID Set selection.
• Activating the digital input selects PID Set 2.
• De-activating the digital input selects PID Set 1.
2…6 =
DI2…DI6 – Defines digital input DI2…DI6 as the control for PID Set selection.
• See
DI1 above.
7 =
SET 2 – PID Set 2 (parameters 4101…4126) is active.
8…11 =
TIMER 1…4 – Defines the Timer as the control for the PID Set selection (Timer de-activated = PID Set 1;
Timer activated = PID Set 2)
See parameter Group 36: Timer Functions.
-1 =
DI1(INV) – Defines an inverted digital input DI1 as the control for PID Set selection.
• Activating the digital input selects PID Set 1.
• De-activating the digital input selects PID Set 2.
-2…-6 =
DI2(INV)…DI6(INV) – Defines an inverted digital input DI2…DI6 as the control for PID Set selection.
• See
DI1(INV) above.
Group 40: Process PID Set 1
Code Description Range Resolution Default S
P 4025
Setpoint
P 4025
C
D
t
P 4026
E
F
P 4026