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Parameter

Rel.

Index

Description Type Store

Size

byte

RO /

R/W

Min. Max. Default

GAIN

Dimensionless value used by the block algorithm in calcu

lating the block output.

Float SRC 4 R/W 0

RESET

24 The integral time constant, in seconds per repeat. Float SRC 4 R/W Positive +INF

BAL_TIME

This specifies the time for the internal working value of bias

or ratio to return to the operator set bias or ratio, in sec

onds. In the PID block, it may be used to specify the time

constant at which the integral term will move to obtain bal

ance when the output is limited and the mode is Auto, Cas,

or RCas.

Float SRC 4 R/W Positive 0

RATE

26 Defines the derivative time constant, in seconds. Float SRC 4 R/W Positive 0

BKCAL_IN

The value and status from a lower block’s BKCAL_OUT that

is used to prevent reset windup and to initialize the control

loop.

DS-65 N 5 R/W

OUT_HI_LIM

28 Limits the maximum output value. Float SRC 4 R/W

OUT_SCALE

±10%

100

OUT_LO_LIM

29 Limits the minimum output value. Float SRC 4 R/W

OUT_SCALE

±10%

BKCAL_HYS

The amount that the output must change away from its out

put limit before the limit status is turned off, expressed as a

percent of the span of the output.

Float SRC 4 R/W 0 50 0.5

BKCAL_OUT

The value and status required by an upper block’s BKCAL_

IN so that the upper block may prevent reset windup and

provide bumpless transfer to closed loop control.

DS-65 D 5 RO

RCAS_IN

Target setpoint and status provided by a supervisory Host

to a analog control or output block.

DS-65 N 5 R/W

ROUT_IN

Target output and status provided by a Host to the control

block for use as the output (ROut mode).

DS-65 N 5 R/W

SHED_OPT

Defines action to be taken on remote control device time

out.

Un-

signed

SRC 1 R/W 0

RCAS_OUT

Block setpoint and status after ramping - provided to a

supervisory Host for back calculation and to allow action to

be taken under limiting conditions or mode change.

DS-65 D 5 RO

ROUT_OUT

Block output and status - provided to a Host for back

calculation in ROut mode and to allow action to be taken

under limited conditions or mode change.

DS-65 D 5 RO

TRK_SCALE

The high and low scale values, engineering units code, and

number of digits to the right of the decimal point, associ-

ated with TRK_VAL.

DS-68 SRC 11 R/W 0-100%

TRK_IN_D

This discrete input is used to initiate external tracking of the

block output to the value specified by TRK_VAL.

DS-66 N 2 R/W

TRK_VAL

This input is used as the track value when external tracking

is enabled by TRK_IN_D.

DS-65 N 5 R/W

FF_VAL

40 The feed forward value and status. DS-65 N 5 R/W

FF_SCALE

The feedforward input high and low scale values, engineer

ing units code, and number of digits to the right of the deci

mal point.

DS-68 SRC 11 R/W 0-100%

FF_GAIN

The gain that the feed forward inpt is multiplied by before it

is added to the calculated control output.

Float SRC 4 R/W 0

UPDATE_EVT

43 This alert is generated by any change to the static data. DS-73 D 14 RO

BLOCK_ALM

The block alarm is used for all configuration, hardware, con

nection failure or system problems in the block. The cause

of the alert is entered in the subcode field. The first alert

to become active will set the Active status in the Status

attribute. As soon as the Unreported status is cleared by

the alert reporting task, another block alert may be reported

without clearing the Active status, if the subcode has

changed.

DS-72

D 13 R/W

ALARM_SUM

The current alert status, unacknowledged states, unreported

states, and disabled states of the alarms associated with

the function block.

DS-74 Mix 8 R/W

ACK_OPTION

Selection of whether alarms associated with the block will

be automatically acknowledged.

0 = Auto Ack Disabled; 1 = Auto Ack Enabled.

Bit

String

SRC 2 R/W 0 1 0

ALARM_HYS

Amount the PV must return within the alarm limits before

the alarm condition clears. Alarm Hysteresis is expressed as

a percent of the PV span.

Float SRC 4 R/W 0 50 0.5

HI_HI_PRI

48 Priority of the high high alarm.

Un-

signed

SRC 1 R/W 0 15 0

HI_HI_LIM

49 The setting for high high alarm in engineering units. Float SRC 4 R/W

PV_

SCALE

+INF +INF

HI_PRI

50 Priority of the high alarm.

Un-

signed

SRC 1 R/W 0 15 0

1 2 ... 29 30 31 32 33 34 35 36 37

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