A5.14 Initialization And Manual Fallback (Iman); A5.14.1 Iman Condition; A5.14.2 Establishment Of Iman Condition; A5.15 Manual Fallback - YOKOGAWA Admag TI Series User Manual

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 Specification of MAN Fallback
Specifies 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
IFS if BAD IN
IFS if BAD CAS IN
Use Uncertain as Good
Target to Manual if BAD IN
Target to next permitted
mode if BAD CAS 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.
When CAS_IN.Status is BAD, the substatus of OUT.Status is set to IFS.
When IN.Status is Uncertain, tries not to handle as BAD. (When IN.Status is
Uncertain, tries not to influence on mode transfer.)
When IN becomes BAD, automatically changes MODE_BLK.Target to MAN.
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.)
<Appendix 5. PID Block>
Setting Contents
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IM 01E21A02-03EN