1-158 ACH550-UH User’s Manual
Parameters
4025 WAKE-UP DEV Depends on Units - 0.0%
and Scale
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 with parameter 4023:
• 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 DEV, for at least this time
period, re-starts the PID controller.
4027 PID 1 PARAM SET -6…14 1 0 (
SET1)
Process PID (PID1) has two separate sets of parameters, PID set 1 and PID set 2.
• PID set 1 uses parameters 4001…4026.
• PID set 2 uses parameters 4101…4126.
PID 1 PARAM SET defines which set is selected.
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 =
TIMED FUNC 1…4 – Defines the Timed function as the control for the PID Set selection (Timed function de-
activated = PID Set 1; Timed function activated = PID Set 2)
•See Group 36: TIMED FUNCTIONS.
12 = 2-
ZONE MIN – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. The drive will control the zone (and select the set) that has a larger difference.
• A positive difference (a setpoint higher than the feedback) is always larger than a negative difference. This keeps
feedback values at or above the setpoint.
• Controller does not react to the situation of feedback above setpoint if another zone’s feedback is closer to its
setpoint.
13 = 2-
ZONE MAX – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. The drive will control the zone (and select the set) that has a smaller difference.
• A negative difference (a setpoint lower than the feedback) is always smaller than a positive difference. This
keeps feedback values at or below the setpoint.
• Controller does not react to the situation of feedback below setpoint if another zone’s feedback is closer to its
setpoint.
14 = 2-
ZONE AVE – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. In addition, it calculates the average of the deviations and uses it to control zone 1. Therefore one
feedback is kept above its setpoint and another is kept as much below its setpoint.
-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
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