Specifications

3Ć45 Theory of Operation: Point Processing
Original Ć June 1990 CE4.2:CL6211
Figure 3Ć11Ć16. PI/PID/Auto/Man/DDC or SUP Loop Point Block Diagram
HIGH OR LOW (C) TRIP POINT (T) DEADBAND (T)
ALARM C
ALARM B
HIGH OR LOW (C) TRIP POINT (T) DEADBAND (T)
TRIP POINT (T)
NOTE: ONLY ONE DEADBAND MAY BE SPECIFIED FOR ALL THREE ALARMS.
REVERSE OR
RESET LAST MODE? (C) RESTART MODE (T)
MODE CONTROL
MODE LOGIC
YES OR NO (C) RESTART IVP (T)
RESTART LAST IVP
DDC CONTROL FROM DATA HIGHWAY
MANUAL OUTPUT (0) FROM CONSOLE OR
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 (T)
IVP (0)
YES OR NO (C)
DEVIATION
CONTROL ACTION
SUPERVISORY CONTROL
SET POINT TRANSFER
PV (0)
VALVE ACTION
SP TRACKS IN DDC
SP TRACKS IN MAN
RESTART LAST SP
Control Sequence without Bias Auto/Man/DDC or SUP Controller Block Diagram
TRACK CONTROL
RESTART SET POINT (T)
SSS
S
S
S
YES OR NO (C) YES OR NO (C)
SSSS
SSS S
SSS
SS
SS
INCREASE OPEN/
S
TO OPERATOR
TO OPERATOR
TO OPERATOR
FROM CONSOLE OR
DEADBAND (T)
CLOSE (T)
FROM DATA HIGHWAY
DIRECT (T)
DEVIATION ALARM
NOTES:
(C) (T) (O)
CONFIGURE TUNE OPERATE ANALOG SIGNALS DISCRETE SIGNALS
WATCHDOG TIMER
RESET
S
OUTPUT TRACKING OVERRIDES MANUAL? (C)
STATION AND DATA HIGHWAY
LOCAL SET POINT FROM CONSOLE OR DATA HIGHWAY
STATION AND DATA HIGHWAY
OPERATOR STATION
YES OR NO (C) TIMEOUT TIME (T)
S
S
COMPUTER BACKUP MODE? (T)
S
OPERATOR STATION STATION AND DATA HIGHWAY
TRACK VALUE
SP (0)
SET POINT LIMITS
SP HIGH LIMIT (T)
SP LOW LIMIT (T)
SS
TO OPERATOR STATION AND DATA HIGHWAY
YES OR NO (C) VELOCITY LIMIT (T)
DEVIATION
PROCESS VARIABLE INPUT
TO DATA
(0)
DEVIATION ALARM (0)
ALARM B(0)
ALARM C
HIGHWAY
TO DATA HIGHWAY
TO OPERATOR STATION AND
TO OPERATOR
STATION
OR
ALARM B OR C (0)
DATA HIGHWAY
OUTPUT TRACK LOGIC
(O)
RESET
OUTLET SVA
INLET SVA
SEE NOTE A
SET POINT VELOCITY LIMIT
SS
NOTE A: ANY NUMBER AND TYPE OF FUNCTION MAY BE INSERTED, EXCEPT FOR THE FEEDFORWARD , LOOP, AND END FUNCTIONS.