DESCRIPTION AND OPERATION
MODES OF OPERATION
I-E96-117B
2 - 5
station out of manual override. The station still sends set point
and target demand output values to the MFP module as in
bypass mode.
MODES OF OPERATION
The MFP module configuration combined with the option set-
tings on the SAC station determine how the station will operate
in each operational mode. The block diagram in Figure
shows the path (operational modes) of station operation from
power up to normal operation.
Figure 2-2. Flow Diagram of SAC Station Operation from Power Up to Normal Operation
TP22086B
NOTES:
1. <S18> THROUGH <S22> REFER TO SPECIFICATIONS
S18 THROUGH S22 OF FUNCTION CODE 80.
2. IF MORE THAN ONE OF <S18> THROUGH <S22> IS SET,
<S18> TAKES PRECEDENCE OVER <S19>
W HICH TAKES PRECEDENCE OVER <S20>.
3. IF <S21> AND <S22> ARE SET, <S21> OVERRIDES <S22>.
4. <S18> THROUGH <S22> TAKE PRECEDENCE OVER STATION
PUSHBUTTONS BUT DO NOT PREVENT CHANGES CAUSED BY
BAD STATION COMMUNICATIONS, BAD CIS STATUS OR M/A
SW ITCH CHANGES.
<S18>=1
OR
<S22>=1
GOOD
COMMUNICATION
CIS STATUS GOOD
PREVIOUS MODE
NORM/MAN
GOOD
COMMUNICATION
CIS STATUS GOOD
PREVIOUS MODE
NORM/AUTO
GOOD
COMMUNICATION
CIS STATUS GOOD
PREVIOUS MODE
NORM/CASC, RATIO
NORM
MAN
BAD
COMMUNICATION
AND AUTO BYPASS
DISABLED
BAD
COMMUNICATION
AND AUTO BYPASS
ENABLED
BAD
COMMUNICATION
AND AUTO BYPASS
ENABLED
MAN PB OR <S18>=1
MAN PB OR <S18>=1
AUTO PB OR <S19>=1
M/A SW = M
BYP,
MANOVR
BYP,
MANOVR
NO COMM
MAN
GOOD
COMM
MAN
COMMUNICATION ESTABLISHED
COMMUNICATION LOST
M/A SW = M
OR CIS
STATUS BAD
<S19>=1
OR
<S22>=1
M/A SW =A
GOOD COMM.
DO=CO FROM CIS
CIS STATUS GOOD
M/A SW =M
OR CIS
STATUS BAD
M/A SW =M
OR CIS
STATUS BAD
<S20>=1
BAD COMMUNICATION
AND AUTO BYPASS
ENABLED
AUTO PB OR <S20>=1
AUTO PB OR <S19>=1
NORM
NORM
AUTO
CASC,
RATIO
<S20>=1
OR
<S22>=1
BAD
COMMUNICATION
AND AUTO BYPASS
DISABLED
SAO
MAN
BAD
COMMUNICATION
AND AUTO BYPASS
DISABLED
GOOD COMMUNICATION
CIS NOT INITIALIZED
CMPTR PB
OR <S21>=1
CMPTR PB
OR <S22>=1
<S21>=1
<S22>=1
NORM
NORM
LOCAL
CMPTR
M/A SW =M
INIT
LEGEND:
AUTO = AUTOMATIC
BYP = BYPASS OPERATION
CASC = CASCADE
CIS = CONTROL I/O MODULE
CMPTR = COMPUTER
COMM = COMMUNICATION
INIT = INITIALIZATION
M/A SW = MANUAL OVERRIDE SW ITCH
MAN = MANUAL
MANOVR = MANUAL OVERRIDE
NORM = NORMAL
PB = PUSHBUTTON
PREVIOUS MODE = STATION MODE IN EFFECT
BEFORE A LOSS OF COMMUNICATION
SAO = STAND-ALONE COMMUNICATION