ABB ACH550-VCR - Page 159

ACH550-UH User’s Manual 1-155
Parameters
4011 INTERNAL SETPNT Depends on Units - 40.0%
and Scale
Sets a constant value used for the process reference.
• Units and scale are defined by parameters 4006 and 4007.
4012 SETPOINT MIN -500.0%…500.0% 0.1% 0.0%
Sets the minimum value for the reference signal source.
• See parameter 4010.
4013 SETPOINT MAX -500.0%…500.0% 0.1% 100.0%
Sets the maximum value for the reference signal source.
• See parameter 4010.
4014 FBK SEL 1…13 1 1 (
ACT1)
Defines the PID controller feedback (actual signal).
• You can define a combination of two actual values (ACT1 and ACT2) as the feedback signal.
• Use parameter 4016 to define the source for actual value 1 (
ACT1).
• Use parameter 4017 to define the source for actual value 2 (
ACT2).
1 =
ACT1 – Actual value 1 (ACT1) provides the feedback signal.
2 =
ACT1-ACT2 – ACT1 minus ACT2 provides the feedback signal.
3 =
ACT1+ACT2 – ACT1 plus ACT2 provides the feedback signal.
4 =
ACT1
*
ACT2 – ACT1 times ACT2 provides the feedback signal.
5 =
ACT1/ACT2 – ACT1 divided by ACT2 provides the feedback signal.
6 =
MIN(ACT1,2) – The smaller of ACT1 or ACT2 provides the feedback signal.
7 =
MAX(ACT1,2) – The greater of ACT1 or ACT2 provides the feedback signal.
8 = sqrt(
ACT1-2) – Square root of the value for ACT1 minus ACT2 provides the feedback signal.
9 = sq
A1+sqA2 – Square root of ACT1 plus the square root of ACT2 provides the feedback signal.
10 = sqrt(
ACT1) – Square root of ACT1 provides the feedback signal.
11 =
COMM FBK 1 – Signal 0158 PID COMM VALUE 1 provides the feedback signal.
12 =
COMM FBK 2 – Signal 0159 PID COMM VALUE 2 provides the feedback signal.
13 =
AVE(ACT1,2) – The average of ACT1 and ACT2 provides the feedback signal.
4015 FBK MULTIPLIER -32.768…32.767 0.001 0.000 (
NOT SEL)
Defines an extra multiplier for the PID feedback value FBK defined by parameter 4014.
• Used mainly in applications where the flow is calculated from the pressure difference.
0.000 =
NOT SEL – The parameter has no effect (1.000 used as the multiplier).
-32.768…32.767 – Multiplier applied to the signal defined by parameter 4014
FBK SEL.
Example:
4016 ACT1 INPUT 1…7 1 2 (AI2) 
Defines the source for actual value 1 (
ACT1). See also parameter 4018 ACT1 MINIMUM.
1 =
AI1 – Uses analog input 1 for ACT1.
2 =
AI2 – Uses analog input 2 for ACT1.
3 =
CURRENT – Uses current for ACT1.
4 =
TORQUE – Uses torque for ACT1.
5 =
POWER – Uses power for ACT1.
6 =
COMM ACT 1 – Uses value of signal 0158 PID COMM VALUE 1 for ACT1.
7 =
COMM ACT 2 – Uses value of signal 0159 PID COMM VALUE 2 for ACT1.
4017 ACT2 INPUT 1…7 1 2 (
AI2) 
Defines the source for actual value 2 (
ACT2). See also parameter 4020 ACT2 MINIMUM.
1 =
AI1 – Uses analog input 1 for ACT2.
2 =
AI2 – Uses analog input 2 for ACT2.
3 =
CURRENT – Uses current for ACT2.
4 =
TORQUE – Uses torque for ACT2.
5 =
POWER – Uses power for ACT2.
6 =
COMM ACT 1 – Uses value of signal 0158 PID COMM VALUE 1 for ACT2.
7 =
COMM ACT 2 – Uses value of signal 0159 PID COMM VALUE 2 for ACT2.
Group 40: Process PID Set 1
Code Description Range Resolution Default S
FBK Multiplier A1 A2–=