
3Ć31 Theory of Operation: Point Processing
Original Ć June 1990 CE4.2:CL6211
Figure 3Ć11Ć2. Manual Loader MAN/DDC Loop Point Block Diagram
TRACK
VALUE
RESTART LAST MODE? (C)
MODE CONTROL
FROM CONSOLE OR
MODE
LOGIC
S
OUTPUT
TRANSFER
OUTPUT
TRACKING
IVP
LIMITS
VALVE
ACTION
CONTROLLER
CURRENT
OUTPUT
OUTPUT TRACKING/NORMAL (O)
IVP HIGH LIMIT (T)
IVP LOW LIMIT (T)
INCREASE OPEN/CLOSE
IVP (0)
SSS S
DEVIATION
ALARM (0)
HIGH OR LOW (C)
TRIP POINT (T)
DEADBAND (T)
ALARM
C
SSS
PROCESS
VARIABLE
VALVE
ACTION
TRACK
CONTROL
ALARM
B
DEVIATION
ALARM
SP TRACKS
IN MAN
HIGH OR LOW (C)
TRIP POINT (T)
DEADBAND (T)
SSS
DEVIATION
SET POINT
LIMITS
RESTART
LAST IVP
RESTART
LAST SP
SET POINT
TRANSFER
OUTPUT TRACKING
OVERRIDES
MANUAL? (C)
INCREASE
OPEN/
CLOSE (T)
MANUAL OUTPUT (O)
FROM CONSOLE OR
YES OR NO (C)
S
YES OR NO (C)
S
NOTE: ONLY ONE DEADBAND MAY BE
SPECIFIED FOR ALL THREE ALARMS.
TRIP POINT (T)
DEADBAND (T)
SS
RESTART SP (T)
LOCAL
SET POINT (O)
FROM CONSOLE OR
Manual Loader MAN/DDC Controller Block Diagram
PV (O)
SS
S
SP HIGH LIMIT (T)
SP LOW LIMIT (T)
SS
YES OR NO (C)
SS
DDC CONTROL FROM DATA HIGHWAY
(T)
SP (O)
RESTART MODE (T)
S
TO OPERATOR
TO OPERATOR STATION
TO OPERATOR
TO OPERATOR STATION
TO OPERATOR
NOTES:
(C)
(T)
(O)
CONFIGURE
TUNE
OPERATE
ANALOG SIGNALS
DISCRETE SIGNALS
RESTART IVP (T)
TO DATA
(0)ALARM C
ALARM B (0)
TO DATA
TO
OPERATOR
STATION
OR
ALARM B OR C (0)
HIGHWAY
HIGHWAY
STATION AND
DATA HIGHWAY
DATA HIGHWAY
SP TRACKS
IN DDC
YES OR NO (C)
S
STATION AND
DATA HIGHWAY
WATCHDOG
TIMER
RESET
OPERATOR STATION
AND DATA HIGHWAY
YES OR NO (C)
TIMEOUT TIME (T)
SS
OPERATOR STATION
AND DATA HIGHWAY
STATION AND
DATA HIGHWAY
OUTPUT
TRACK
LOGIC
Comentarios a estos manuales