Analog Alarm Block Fields

The following table lists the fields available for this block, what each field displays, as well as the valid entries for each field in the list.

The field...

Displays...

Valid Entry

A_AACK

A block and field to use for alarm acknowledgment.

Block.field

A_ADI

The blocks alarm areas.

N/A. This field is provided for backward compatibility.

A_ALMEXT1
A_ALMEXT2

The text entered in the blocks alarm extension fields.

Up to 79 characters.

A_ALMINTIME

The time and date at which the block generated the alarm.

N/A. This is a display only field.

A_ALMLASTTIME

The time and date at which the block last generated an alarm.

N/A. This is a display only field.

A_ALMSN

The serial number of the alarm area database.

N/A. This is a display only field.

A_ALMOCCUR
F_ALMOCCUR

The number of times a block goes in and out of alarm before it is acknowledged.

N/A. This is a display only field.

A_ALMSHELFREMTIME

F_ALMSHELFREMTIME

The remaining time left for a shelved alarm. N/A. This is a display only field.

A_ALMSHELVED

F_ALMSHELVED

Indicates whether a specified alarm is shelved (YES/NO). N/A. This is a display only field.

A_ALMSHELVEPOLICY

The name of alarm shelving policy. N/A. This is a display only field.

A_ALMSHLVENAB

F_ALMSHLVENAB

Defines whether alarm shelving is enabled (YES/NO) for a block. N/A. This is a display only field.

A_IALMSHLVENAB

F_IALMSHLVENAB

The initial alarm shelving status (ENABLE/DISABLE) for a block. N/A. This is a display only field.

A_ALM_SUSPENDMODE

F_ALM_SUSPENDMODE

Configures Event messaging (Suspend mode), which applies to the process alarm limit as an event.

Enable: Yes (1), or Disable: No (0).

A_AREA1 through A_AREA15

The alarm areas assigned to the block.

ALL or an alarm area name.

A_ASUSP

A block and field that controls whether the Analog Alarm block processes alarms.

Block.field

A_AUTO
F_AUTO

The current automatic/manual status of the block.

Automatic (1) or Manual (0).

A_CCDEV

The digital block to close when deviation alarms occur.

FIX32.node.block.field

A_CCHH

The digital block to close when High High alarms occur.

FIX32.node.block.field

A_CCHI

The digital block to close when High alarms occur.

FIX32.node.block.field

A_CCLL

The digital block to close when Low Low alarms occur.

FIX32.node.block.field

A_CCLO

The digital block to close when Low alarms occur.

FIX32.node.block.field

A_CCOTH

The digital block to close when other alarms occur.

FIX32.node.block.field

A_CCROC

The digital block to close when Rate of Change alarms occur.

FIX32.node.block.field

A_CHALM

The chains most severe alarm.

N/A. This is a display only field.

A_COMM_SURPRESS
F_COMM_SURPRESS

Sets whether COMM alarms are suppressed for this block.

When selected, this option separates the original alarm condition from the COMM alarm, and returns the block to the same state as it was prior to a COMM alarm. For example, if prior to the COMM alarm, the AA block was an active alarm but already acknowledged, that is the state it should return to after communication is restored.

If disabled, AA blocks handle one alarm at a time. As a result, it is possible that acknowledgement of a COMM alarm could cause the ACK bit in the PLC to be written, and the original alarm condition, if already acknowledged, could re-alarm.

Enable (1) or Disable (0).

A_CTK_PERSIST
F_CTK_PERSIST

Sets whether blocks allow write attempts to the contact(s) with every scan, even if the value being written is unchanged.

When disabled, the AA block only attempts to write to the defined contact tag when a value has changed and it needs to be written to the PLC. The write is a one-time attempt, so if it fails, the write will not be retried until the block needs to write a new value.

NOTE: There are four modes for the contacts - “Acknowledge”, “Return”, “All Clear”, and “Never” - that control when the contact is cleared. Since the contact mode of “Never” does not reset the contact, the Continuous Output option is not supported for this contact mode.

Enable (1) or Disable (0).

A_CUALM

The blocks current alarm.

N/A. This is a display only field.

A_CV
E_CV
F_CV

The blocks current value.

A numeric value within the EGU range.

A_DALM
F_DALM

Whether to delete alarm from summary queue after acknowledgment.

0 (false) or 1 (true).

A_DBAND
F_DBAND

The maximum fluctuation the block accepts without re-issuing an alarm.

A numeric value within the EGU range.

A_DESC

The text in the blocks Description field.

Up to 256 characters.

A_DEV
E_DEV
F_DEV

The blocks deviation alarm limit.

A numeric value within the EGU range.

A_DTDEV

The length of time to wait before generating deviation alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTHH

The length of time to wait before generating High High alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTHI

The length of time to wait before generating High alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTLL

The length of time to wait before generating Low Low alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTLO

The length of time to wait before generating Low alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTOTH

The length of time to wait before generating other alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_DTROC

The length of time to wait before generating rate of change alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).  

A_DVALM

The current alarm status for deviation alarms.

N/A. This is a display only field.

A_DVPRI

The alarm priority of deviation alarms.

Low, Medium, or High.

A_EGUDESC

The blocks engineering units label.

Up to 33 characters.

A_EHI
E_EHI
F_EHI

The blocks high EGU limit.

A numeric value. The range between the low and high values value cannot exceed 3.40282300000000e+38.

A_ELO
E_ELO
F_ELO

The blocks low EGU limit.

A numeric value. The range between the low and high values value cannot exceed 3.40282300000000e+38.

A_ENAB
F_ENAB

The blocks alarm status.

Enable: Yes (1), or Disable: No (0).

A_EOUT

Yes, if the block writes data to the process hardware, or No, if the block does not.

Yes or No.

A_ESIGACK
F_ESIGACK

Whether operators are allowed to acknowledge alarms for this tag without entering a signature, even if this tag requires electronic signatures for data entry.

Yes or No.

A_ESIGCONT
F_ESIGCONT

If allow continuous use is enabled for this tag.

Yes or No.

A_ESIGREQ_COMMENT

F_ESIGREQ_COMMENT

A comment is required when using an electronic signature.

Enable: Yes (1), or Disable: No (0).

A_ESIGTRAP
F_ESIGTRAP

Whether unsigned writes are accepted or rejected by this tag or accepted and logged.

ACCEPT, LOG, REJECT.

A_ESIGTYPE
F_ESIGTYPE

The signing requirements for this tag.

None, PERFONLY, or PERFVERI.

A_ETAG

The first four characters of the blocks engineering units label.

N/A. This field is provided for backward compatibility.

A_EVENT

The initial event messaging status.

N/A. This is a display only field.

A_HHALM

The current alarm status for High High alarms.

N/A. This is a display only field.

A_HHPRI

The alarm priority of High High alarms.

Low, Medium, or High.

A_HI
E_HI
F_HI

The blocks High alarm limit.

A numeric value within the EGU range.

A_HIHI
E_HIHI
F_HIHI

The blocks High High alarm limit.

A numeric value within the EGU range.

A_HIALM

The current alarm status for High alarms.

N/A. This is a display only field.

A_HIPRI

The alarm priority of High alarms.

Low, Medium, or High.

A_HIST_COLLECT
F_HIST_COLLECT

Sets whether or not this block is under collection.

Yes (1) or No (0).

A_HIST_COMPRESS
F_HIST_COMPRESS

Sets whether or not compression is used by the Collector.

Enable (1) or Disable (0).

A_HIST_COMPTIME
F_HIST_COMPTIME

The Collector compression time out.

A positive numeric value (0 or greater), in milliseconds.

A_HIST_COMPTYPE
F_HIST_COMPTYPE

The type of Collector deadband setting.

Absolute (0) or Percentage (1).

A_HIST_DEADBAND
F_HIST_DEADBAND

The Collector deadband setting.

A positive numeric value (0 or greater).

A_HIST_DESC

The Proficy Historian description.

String; maximum of 128 characters.

A_HIST_INTERVAL
F_HIST_INTERVAL

The collection interval for this block. The value of this field must be greater than the value of the A_HIST_OFFSET and F_HIST_OFFSET fields.

Use the following formula to determine if the entered value is acceptable for this field.

A_/F_HIST_INTERVAL > A_/F_HIST_OFFSET * 1000

NOTE: The values for the A_HIST_OFFSET and F_HIST_OFFSET fields are in seconds.

A float value, in milliseconds. Values must be entered in increments of 100. Minimum value: 100 ms.

A_HIST_OFFSET
F_HIST_OFFSET

The block's collection offset time.The value of this field must be less than or equal to the value of the A_HIST_INTERVAL and F_HIST_INTERVAL fields.

Use the following formula to determine if the entered value is acceptable for this field.

A_/F_HIST_OFFSET ≤ A_/F_HIST_INTERVAL / 1000

NOTE: The values for the A_HIST_INTERVAL and F_HIST_INTERVAL fields are in milliseconds.

A numeric value, in seconds. Must use whole numbers.

A_HIST_TIMERES
F_HIST_TIMERES

The collection time resolution.

Milliseconds (0) or Seconds (1).

A_IAM

The initial Automatic/Manual status of the block.

Automatic or Manual.

A_IENAB

The initial alarm status.

N/A. This is a display only field.

A_IOAD

The blocks I/O address.

Depends on your driver. Refer to your driver manual for more information.

A_IODV

The name of the blocks I/O driver.

Depends on your driver. Refer to your driver manual for more information.

A_IOHT

The I/O drivers hardware options.

Depends on your driver. Refer to your driver manual for more information.

A_IOSC

The type of signal conditioning used by the block.

Depends on your driver. Refer to your driver manual for more information.

A_ISCAN

The initial scan status (on or off) of the block.

On or Off

A_LAALM

The blocks most severe unacknowledged alarm. If no unacknowledged alarm exists, the current alarm is displayed.

N/A. This is a display only field.

A_LAPRI The block's latched priority. This priority corresponds to the block's latched alarm (A_LAALM). N/A. This is a display only field.

A_LLALM

The current alarm status for Low Low alarms.

N/A. This is a display only field.

A_LLPRI

The alarm priority of Low Low alarms.

Low, Medium, or High.

A_LO
E_LO
F_LO

The blocks Low alarm limit.

A numeric value within the EGU range.

A_LOALM

The current alarm status for Low alarms.

N/A. This is a display only field.

A_LOLO
E_LOLO
F_LOLO

The blocks Low Low alarm limit.

A numeric value within the EGU range.

A_LOPRI

The alarm priority of Low alarms.

Low, Medium, or High.

A_MDEDV

When to open the deviation alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDEHH

When to open the High High alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDEHI

When to open the High alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDELL

When to open the Low Low alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDELO

When to open the Low alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDEOT

When to open the other alarms contact.

Acknowledge, Return, All Clear, or Never.

A_MDERC

When to open the contact for Rate of Change alarms.

Acknowledge, Return, All Clear, or Never.

A_NALM
F_NALM

Yes or 1, if the block has unacknowledged alarms or
No or 0, if the block has no unacknowledged alarms.

N/A. This is a display only field.

A_NAME

The blocks type, for example AI for an Analog Input block.

N/A. This is a display only field.

A_NAREA

Enters a new alarm area in the alarm area database.

N/A. This is a write only field.

A_NEXT

The name of the next block in the chain.

N/A. This is a display only field.

A_OPCLIMIT

The hardware options of the OPC server.

N/A. This is a display only field.

A_OPCQLTY

The quality status of the OPC server.

N/A. This is a display only field.

A_OPCSUBSTAT

The quality substatus of the OPC server.

N/A. This is a display only field.

A_OPCTIME

The time and date from the OPC server.

N/A. This is a display only field.

A_OTALM

The current alarm status for other alarms.

N/A. This is a display only field.

A_OTPRI

The alarm priority of other alarms.

Low, Medium, or High.

A_PDR_ACCESSTIME
F_PDR_ACCESSTIME

Reserved. N/A.

A_PDR_ARRAYLENGTH
F_PDR_ARRAYLENGTH

Reserved. N/A.

A_PDR_DEADBAND
F_PDR_DEADBAND

Reserved. N/A.

A_PDR_DISABLEOUT
F_PDR_DISABLEOUT

Reserved. N/A.

A_PDR_LATCHDATA
F_PDR_LATCHDATA

Reserved. N/A.

A_PDR_UPDATERATE
F_PDR_UPDATERATE

Reserved. N/A.

A_PREV

The name of the previous block in the chain.

N/A. This is a display only field.

A_PRI

The blocks alarm priority.

Low, Medium, or High.

A_PRIM

The blocks name.

N/A. This is a display only field.

A_RATDV

The length of time to wait before re-issuing deviation alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RATHH

The length of time to wait before re-issuing High High alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RATHI

The length of time to wait before re-issuing High alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RATLL

The length of time to wait before re-issuing Low Low alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).  

A_RATLO

The length of time to wait before re-issuing Low alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RATOT

The length of time to wait before re-issuing other alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RATRC

The length of time to wait before re-issuing Rate of Change alarms.

Any time from 00:00:00:00 to 03:00:00:00 (up to 3 days, in the time format of  dd:hh:mm:ss).

A_RCALM

The current alarm status for Rate of Change alarms.

N/A. This is a display only field.

A_RCPRI

The alarm priority for Rate of Change alarms.

Low, Medium, or High.

A_ROC
E_ROC
F_ROC

The maximum, acceptable change in the blocks value that can occur between scan periods.

A numeric value within the EGU range.

A_SA1
through
A_SA3

The security areas assigned to the block.

Up to three security area names.

A_SCALE_CLAMP
F_SCALE_CLAMP

Whether the data received or sent will be limited to the ranges specified in the following fields:

  • A_/E_/F_SCALE_HIGH
  • A_/E_/F_SCALE_LOW
  • A_/E_/F_SCALE_RAWHIGH
  • A_/E_/F_SCALE_RAWLOW

Yes (1) or No (0).

A_SCALE_ENABLED
F_SCALE_ENABLED

Whether linear scaling is enabled.

Yes (1) or No (0).

A_SCALE_HIGH
E_SCALE_HIGH
F_SCALE_HIGH

The high limit of the sent values.

A numeric value.

A_SCALE_LOW
E_SCALE_LOW
F_SCALE_LOW

The low limit of the sent values.

A numeric value.

A_SCALE_RAWHIGH
E_SCALE_RAWHIGH
F_SCALE_RAWHIGH

The high limit of the received values.

A numeric value.

A_SCALE_RAWLOW
E_SCALE_RAWLOW
F_SCALE_RAWLOW

The low limit of the received values.

A numeric value.

A_SCALE_USEEGU
F_SCALE_USEEGU

Whether Engineering Units are used for scaling block output.

Yes (1) or No (0).

A_SCAN

The on/off scan status of the block.

On or Off.

A_SCANT

The blocks scan time and phase.

E for exception-based processing, 0 for one shot processing, or time:phase for time-based processing.

A_SMOTH

The smoothing value.

0 to 15.

A_TAG

The blocks name.

N/A. This is a display only field.

A_TARG
F_TARG

The blocks optimum value or block and field name followed by:

  • R if the value is retrieved from a block.
  • L if the value is local.

Block.field or a numeric value within the EGU range.

A_TRTAG

The blocks deviation alarm limit.

A numeric value within the EGU range.

A_TYP1
through
A_TYP7

Text describing each type of alarm the block generates.

Up to 3 characters.

A_WARM

Yes or No.

N/A. This is a display only field.

A_ALMACK
F_ALMACK

Reserved. N/A.

A_ALMCHANGE
F_ALMCHANGE

Reserved. N/A.

A_ALMDELETE
F_ALMDELETE

Reserved. N/A.

A_ALMGEN
F_ALMGEN

Reserved. N/A.

A_ALMRESET
F_ALMRESET

Reserved. N/A.

A_ALMUPDATE
F_ALMUPDATE

Reserved. N/A.

A_PUBLISH
F_PUBLISH

Reserved. N/A.

A_WRITABLE
F_WRITABLE

Reserved. N/A.