Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 96)

Programming
Chapter 3
3Ć53
START
PV
HARDWARE
A/D
W18 B15
YES
W18 B14
PC PV
USE VALUE
USE PV
PV
W30 B17
EXPANDED
W01 B14
NO
READ PV
YES
NO
(EXP)
W18 B07 B06
YES
t
ENTER MIN
S MIN
CHOOSE
CHOOSE
CHOOSE
W18 B03
USE
EXPANDED
NO
ERROR
/
W18 B11
DEAD
S MAX
TO DERIVATIVE
PROPORTIONAL
LIMIT D
VD MAX
DEAD BAND
ZERO
FROM PV
I VD I > VD MAX
I VD 1 > VD
( )
E
NO
V
ERROR
THEN E = 0
IF E
ANALOG
LOSS OF
PV
DIGITAL
PERFORM
TA
DERIVATION
KD
YES
ANALOG
INPUT
(W38 B15)
FROM PC
PROCESSOR
FROM PC INPUT
W61 B07
(W68 B07)
INPUT
4095 B/B
W01 B12
W64 (W71)
4095 B/B W01 B12
W09 (W16)
(W38 B14)
PV
FILTER
99.99
W20 (W40)
MW19 B12
(MW39 B12)
TA 0 MEANS OFF
W65 (W72)
SW61 B16
(SW68 B16)
(STANDARD)
LOOP
SELECTED
(W50 B17)
SCALING
(EXPANDED)
AND MAX
SCALING
VALUES
9999
W31 (W51)
MW19 B06
(MW39 B06)
SW30 B04
(SW50 B04)
USE PV
+
-
W30 B16
YES
YES
SP
W01 B14
EXPANDED
SP
NO NO
SP
CASCADE
SP
D
FROM
CASCADE LOOP
LOOP 2 ONLY
SP
PV
A
S
E = SP - PV
CHANGE
(-)
X(-1)
YES
NO
E=SP-PV
W18 B12
ERROR
YES
NO
IF E
E=PV-SP
E
E>EMP EMP
EMN
9999
W32 (W52)
MW19 B06
(MW39 B06)
S W30 B03
(S W50 B03)
+
-
/
YES
NO NO
9999
W06 (W13)
MW19 B06
(MW39 B06)
SW19 B07
(SW19 B07)
+
-
(W50 B16)
SCALING
(EXPANDED)
LOOP
SELECTED
(STANDARD)
W21 (W41)
4095
4095 B/B
W01 B11
W06 (W13) CASCADE
SHEET 3
1 TO LOOP 2
LOOP VALUE
ENTERS HERE
ENABLED BY W30 B00
FUNCTION
SHEET 2
TO
E=PV-SP ?
E
(W38 B12)
LIMIT
THEN E=EMN
IF E>EMP
THEN E=EMP
W61 B15
(W68 B15)
W61 B14
(W68 B14)
W22
(W42)
4095
3
DB
W61 B11
(W68 B11)
BAND
(W38 B11)
3
DB
CROSSING
4095
W23 (W43)
LOOP
FEATURES
(STANDARD)
FUNC-
TION
9999
W62 (W69)
SW61 B17
(SW68 B17)
+
-
YES
YES
YES
YES
YES
YES
YES
(EXP)
SCALING
ERROR
FUNCTION
(W38 B07 B06)
FUNCTION
Kp ( )
ERROR
FUNCTION
E
E
(W38 B03)
A
S
PV
NO
NO
NO NO
NO
NO
ERROR
OR PV
SHEET 2
99.99
W25 (W45)
MW19 B01 B00
(MW39 B01 B00)
W27 (W47)
VD MAX
D
THEN I VD I = VD MAX
W61 B02
(W68 B02)
MAX
FUNCTION
KD D
W61 B10
V1 MAX
I V1 1
W18 B10
LIMIT
IF K1=0 TERM
V1 MAX
BUMPLESS TRANSFER
V
INTEGRAL
FUNCTION
VD MAX
(W38 B10)
AND HOLDS ARE
PERFORMED HERE
K1
9.999
W24 (W44)
MW19 B03 B02
(MW39 B03 B02)
SET TO 0
.
THEN I V1 I = V1
MAX
P
W26 (W46)
(W68 B10)
I V1 1 V1
.
MAX
KP
V
V
I VP I > 4095 HOLD LAST
PERFORM
B
TO SHEET 3
SEND LOOP1
DECOUPLE
LOOP 1
TO
W18 B01
HOLD
W61 B03
(W68 B03)
99.99
W07 (W14)
MW19 B05 B04
(MW39 B05 B04)
I
PID = V P I
+ V
+ V
D
(W38 B01)
VPID
VALUE
BUMPLESS
TRANSFER
DECOUPLE
VPID
VALUE TO
LOOP 2
LOOP 1 TO
LOOP 2
SHEET
3
ONLY.
ENABLED
BY W30
B14
VPID
(NORMALIZED)
(+)
W18 B13
(W38 B13)
> k1 ( )
D
t
11119