S3: Secondary Pi (Pi2) Control - YASKAWA P1000 Technical Manual

Setting 0: Digital Output Only
Setting 1: Run
Setting 2: Run - PI Disable
Setting 3: Allow Alternation
When Sequence Selection is set to Allow Alternation and that timer is enabled (S2-03, S2-08, S2-13, S2-18 > 0), the drive
will only allow MEMOBUS alternation to occur during the time specified in the corresponding Sequence Timer. Alternation
is disabled when the timer deactivates.
n S2-05/S2-10/S2-15/S2-20: Sequence Timers 1/2/3/4 Reference Source
Selects the frequency reference source used for running the drive when sequence timers 1 to 4 are active (only applicable when
S2-04/S2-09/S2-14/S2-19 are set to 1 or 2).
No.
S2-05
S2-10
S2-15
S2-20
Setting 0: Operator (d1-01)
Setting 1: Operator (d1-02)
Setting 2: Operator (d1-03)
Setting 3: Operator (d1-04)
Setting 4: Terminals
Setting 5: Serial Communication
Setting 6: Option Card
Setting 7: Pulse Input
u

S3: Secondary PI (PI2) Control

The drive has a built in PI (Proportional + Integral) controller that can be used for closed loop control of system variables such
as pressure or temperature. The difference between the target and the feedback value (deviation) is fed into the PI controller
and the PI controller outputs the frequency to U5-oo for monitoring.
S3-05
PI Setpoint
H3-02/H3-06/
H3-10=26
Terminal A1/A2/A3
MEMOBUS
000FH
MEMOBUS 000Dh bit 4 = 1
PI2 Setpoint
U5-17
PI2 Setpoint
H3-02/
H3-06/
H3-10=25
Terminal A1/A2/A3
U5-18
PI2 Feedback
n S3-01: Secondary PI Enable Selection
Determines when the secondary PI controller is enabled.
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Name
Sequence Timer 1 Reference Source
Sequence Timer 2 Reference Source
Sequence Timer 3 Reference Source
Sequence Timer 4 Reference Source
U5-19
PI2 Input
PI2 P Gain
+
S3-11 = 0
S3-06
-
-1
-1
S3-11 = 1
PI2 Invert
Multi-function
Input Closed
<1> Actual integral limit is calculated as follows:
Upper limit = Min (S3-08, S3-09 - PI2 P portion)
Lower limit = Min (-S3-08, S3-10 - PI2 P portion)
<2> When PI2 Disable multi-function input is closed, set PI Integrator as follows:
S3-12 = 1: PI I Value = S3-10
S3-12 = 2: PI I Value = S3-05
Figure 5.94 PI2 Block Diagram
Setting Range
Refer to b5: PID Control on page 160
Lower Limit:
PI2 Output Lower Limit
PI2
Integral
Hold Multi-
S3-08 PI2 Integral
function
PI2 I Limit Reset Multi-
Input
Function Input
<1>
PI2 I Time
+
1
S3-07
+
z
-1
5.11 S: Special Application
Default
0 to 7
0 to 7
0 to 7
0 to 7
for details.
S3-12
2
1
0
S3-10
Upper Limit:
S3-09 U5-20
PI2 Output
PI2 Output Upper
Limit
+
+
Lower Limit:
PI2 Disable
S3-10
Multi-function
PI2 Output Lower Limit
Input
<2>
0
0
0
0
5
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