
3Ć30 Theory of Operation: Point Processing
Original Ć June 1990CE4.2:CL6211
Figure 3Ć11Ć1. Manual Loader MAN Loop Point Block Diagr
am
PROCESS
VARIABLE
SET POINT
TRANSFER
SP TRACKS
IN MAN
YES OR NO (C)
S
RESTART
LAST SP
YES OR NO (C)
SS
RESTART
LAST IVP RESTART IVP (T)
YES OR NO (C)
SS
OUTPUT
TRANSFER
OUTPUT
TRACKING
IVP
LIMITS
IVP HIGH LIMIT (T)
IVP LOW LIMIT (T)
SS
VALVE
ACTION
INCREASE OPEN/CLOSE (T)
S
CONTROLLER
CURRENT
OUTPUT
TRACK
VALUE
VALVE
ACTION
TRACK
CONTROL
IVP (0)
ALARM
C
ALARM
B
TO DATA
(0)ALARM C
SET POINT
LIMITS
DEVIATION
DEVIATION
ALARM
DEVIATION
ALARM (0)
ALARM B (0)
HIGH OR LOW (C)
TRIP POINT (T)
DEADBAND (T)
SSS
OUTPUT
TRACKING
OVERRIDES
MANUAL? (C)
S
INCREASE
OPEN/CLOSE (T)
S
HIGH OR LOW (C)
TRIP POINT (T)
DEADBAND (T)
SSS
TRIP POINT (T)
DEADBAND (T)
SS
SP (0)
NOTE: ONLY ONE
DEADBAND MAY BE
SPECIFIED FOR ALL
THREE ALARMS.
OUTPUT
TRACKING/NORMAL ?
(O)
S
Manual Loader Controller Block Diagram
MANUAL OUTPUT (O)
FROM CONSOLE OR
SP HIGH LIMIT (T)
SP LOW LIMIT (T)
SS
PV (O)
TO DATA
TO OPERATOR
TO OPERATOR
TO OPERATOR
TO OPERATOR
NOTES:
(C)
(T)
(O)
CONFIGURE
TUNE
OPERATE
ANALOG SIGNALS
DISCRETE SIGNALS
TO
OPERATOR
STATION
OR
ALARM B OR C (0)
STATION AND
DATA HIGHWAY
STATION AND
DATA HIGHWAY
OPERATOR STATION
LOCAL SET POINT (O)
FROM CONSOLE OR
DATA HIGHWAY
STATION AND
DATA
HIGHWAY
RESTART SP (T)
HIGHWAY
HIGHWAY
STATION AND
DATA HIGHWAY
OUTPUT
TRACK
LOGIC
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