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IM 01E21A02-03EN
A5.14 Initialization and Manual Fallback (IMan)
Initialization and manual fallback denotes an abnormality processing function in which the PID
blockchangesmodetoIMan(initializationandmanual)andsuspendsthecontrolaction.The
functionoperateswhentheinitializationandmanualfallbackconditions(IMancondition)aremet.
A5.14.1 IMan condition
The IMan conditions are transition conditions of the mode to temporarily suspend control action
by changing the block mode to the IMan mode.
Please note that the IMan mode is the mode to transition only when the IMan conditions are
established.
A5.14.2 Establishment of IMan condition
The IMan conditions are established in the following cases.
• Whenquality=BADinDatastatusofBKCAL_IN(Status).
• Whensubstatus=Good(c)-FSA,LO,NIandIRinDatastatusofBKCAL_IN(Status).
A5.15 Manual Fallback
MAN fallback denotes an abnormality processing function in which the PID block changes a
mode to Man and suspends the control action.
A5.15.1 Condition of MAN Fallback
Theconditionisestablishedwhentheinputdatastatus(IN.Status)isBAD.
(ExcludingwhenBYPASS)
A5.15.2 SpecicationofMANFallback
SpeciesTargettoManualifBADINwithSTATUS_OPTS.
A5.15.3 STATUS_OPTS
The table below shows settings of STATUS_OPTS.
Options in STATUS_OPTS Setting Contents
IFS if BAD IN
Sets the sub-status component of OUT.status to IFS if IN.status is Bad. Does not
set while PID control bypass is on.
IFS if BAD CAS IN When CAS_IN.Status is BAD, the substatus of OUT.Status is set to IFS.
Use Uncertain as Good
WhenIN.StatusisUncertain,triesnottohandleasBAD.(WhenIN.Statusis
Uncertain,triesnottoinuenceonmodetransfer.)
Target to Manual if BAD IN WhenINbecomesBAD,automaticallychangesMODE_BLK.TargettoMAN.
Target to next permitted
mode if BAD CAS IN
WhenCAS_INbecomesBAD,changesMODE_BLK.TargettoAuto.(WhenAuto
is not permitted as the destination of transition by Permitted, the destination of
transitionischangedtoMan.)
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