Fco105 - Ratio Set Control W/ Operator Setpoint Limits - Siemens 353 User Manual

Factory Configured Options

4.5 FCO105 - Ratio Set Control w/ Operator Setpoint Limits

Factory Configured Option FCO105 provides a ratio set controller in Loop01. The setpoint to the Captive Flow
controller can be maintained as a ratio of the Captive Flow to Wild Flow. The controller has complete setpoint
tracking as well as ratio tracking. The local setpoint will track the Captive Flow signal when the loop is not in auto
(NA) OR is in External (Ratio) Set (ES). The value of the RATIO will be computed as Captive Flow
Flow while in the tracking mode which occurs whenever the loop is not in auto (NA) OR is in Internal Set (IS). The
tracking features can be removed by setting the TC inputs to UNCONFIG. The Wild Flow signal will be displayed
on Variable X and the actual Ratio CF/WF will be displayed on Variable Y.
Wild Flow
0.00-100.00 PRCT
O1
AIN1
QS
TV
TC
SR
LU
LD
Captive Flow
0.00-100.00 PRCT 0.00-100.00 PRCT
O1
AIN2
QS
P
D
(Rev. 2)
SETPT - Setpoint Function Block
RG PTR - Range Pointer ------ Loop01.AIN2.OR
INPUT TV - Input TV --------- Loop01.AIN2.O1
INPUT TC - Input TC --------- Loop01.OR02.O1
INPUT LU - Input LU --------- Loop01.SPLIM.HS
INPUT LD - Input LD --------- Loop01.SPLIM.LS
ESN - Exec. Seq. No.----------- 5
PB2SW - PB2 Switch Function Block
INPUT MD - Input MD ------- Loop01.E/I.SE
ESN - Exec. Seq. No. ---------- 10
ALARM - Alarm Function Block
RG PTR - Range Pointer ------- Loop01.AIN2.OR
INPUT P - Input P -------------- Loop01.AIN2.O1
INPUT D - Input D ------------- Loop01.SPLIM.O1
ESN - Exec. Seq. No. ---------- 15
4-8
X
A
O1
E
RATIO
TO
TC
TV
NC
NO PS
PB2SW
MD
SETPT
O1
P
A1
A2
ALARM
A3
A4
D
O1
DIV01
N
0.50 - 1.50 CF/WF
SPLIM
O1 A
ST
SE
E
E/I
SI
I
IS
IO
ES
P O1 A
S PID AE TV
A/M
F AW TC
A EM
I
RATIO - Ratio Function Block
HI LIMIT - HI Range LIMIT ----- 1.50
LO LIMIT - LO Range LIMIT ---- 0.50
INPUT A - Input A ----------------- Loop01.AIN1.O1
INPUT TC - Input TC -------------- Loop01.OR01.O1
INPUT TV - Input TV -------------- Loop01.SPLIM.O1
ESN - Exec. Seq. No.--------------- 20
E/I - Ext/Int Transfer Switch Function Block
INPUT ST - Input ST -------------- Loop01.PB2SW.PS
INPUT E - Input E ------------------ Loop01.RATIO.O1
INPUT I - Input I ------------------- Loop01.SETPT.O1
ESN - Exec. Seq. No. -------------- 25
SPLIM - Setpoint Limit Function Block
RG PTR - Range Pointer ----------- Loop01.AIN2.OR
INPUT A - Input A ----------------- Loop01.E/I.O1
ESN - Exec. Seq. No. -------------- 30
UM353-1B
setpoint
O1
A
SCL01
Y
A
B
OR01
O1
C
HS
LS
A
B
OR02
C
S
O1 S
AOUT1
AS D
NA QS
MS
ES
Valve
SS
V
LOOP01
April 2012
/ Wild
O1
O1