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3.2 Analogue Input Blocks (PA Slot 1 & 2) Parameter List, Profibus

Parameter

Rel.

Index

Description Type Store

Size

byte

RO /

R/W

Min. Max. Default

ST_REV

Static Revision. Counter incremented with every parameter

configuration change.

Un-

signed

N 2 RO 0

TAG_DESC

2 A user-supplied description of the block.

Octet

string

SRC 32 R/W “ “

STRATEGY

Grouping of Function Block. The STRATEGY field can be used

to group blocks.

Un-

signed

SRC 2 R/W 0

ALERT_KEY

Contains the identification number of the plant unit. It helps to

identify the location (plant unit) of an event.

Un-

signed

SRC 1 R/W 0

TARGET_MODE

Contains desired mode normally set by a control application or

an operator.

Un-

signed

SRC 1 R/W -

MODE_BLK

Contains the current mode and the permitted and normal

mode of the block.

DS-37 D 3 RO

128,152,

ALARM_SUM

7 Contains the current states of the block alarms. DS-42 D 8 RO 0;0;0;0

BATCH

Intended to be used in Batch applications in line with

IEC61512 Part 1. Necessary in a distributed fieldbus system to

identify used and available channels, in addition used to iden

tify the current batch in case of alerts.

DS-67 SRC 10 R/W 0;0;0;0

OUT

Contains the current measurement value in a vendor-specific or

configuration-adjusted engineering unit and the belonging state

in AUTO MODE.

DS-33 D 5

**)

Measured of

the variable

state

PV_SCALE

Conversion of the Process Variable into percent using the

high and low scale values. The engineering unit of PV_SCALE

high and low scale values are directly related to the PV_UNIT

of the configured Transducer Block (configured via Channel

parameter). The PV_SCALE high and low scale values follow

the changes of the PV_UNIT of the related Transducer Block

automatically, i.e. a change of the Transducer Block PV_Unit

causes no bump at OUT from AI.

Float

SRC 8 R/W 100; 0

OUT_SCALE

Scale of the Process Variable. Contains the values of the lower

limit and upper limit effective range, the code number of the

engineering unit of Process Variable and the number of digits

on the right hand side of the decimal point.

DS-36 SRC 11 R/W

100; 0;

-; -

LIN_TYPE

13 Type of linearisation.

Un-

signed

SRC 1 R/W 0

CHANNEL

Reference to the active Transducer Block which provides the

measurement value to the Function Block.

Un-

signed

SRC 2 R/W

1 : 281

2 : 283

PV_FTIME

Filter time of the Process Variable. Contains the time constant

for the rise time of the FB output up to a value of 63.21%

resulted from a jump on the input (PT1 filter). The engineering

unit of the parameter is second.

Float SRC 4 R/W 0

FSAFE_TYPE

Defines the reaction of the device if a fault is detected. The

calculated ACTUAL MODE remains in AUTO.

Un-

signed

SRC 1 R/W 1

FSAFE_VALUE

Default value for the OUT parameter, if sensor or sensor elec

tronic fault is detected. The unit of this parameter is the same

as the OUT unit.

Float SRC 4 R/W -

ALARM_HYS

19 Alarm hysteresis. To avoid triggering of many messages. Float SRC 4 R/W

0,5% of

range

HI_HI_LIM

21 Value for the upper limit of alarms. Float SRC 4 R/W

Max

value

HI_LIM

23 Value for the upper limit of warnings. Float SRC 4 R/W

Max

value

LO_LIM

25 Value for the lower limit of warnings. Float SRC 4 R/W

Min

value

LO_LO_LIM

27 Value for the lower limit of alarms. Float SRC 4 R/W

Min

value

HI_HI_ALM

30 State of the upper limit of alarms. DS-39 D 16 RO 0

HI_ALM

31 State of the upper limit of warnings. DS-39 D 16 RO 0

LO_ALM

32 State of the lower limit of warnings. DS-39 D 16 RO 0

LO_LO_ALM

33 State of the lower limit of alarms. DS-39 D 16 RO 0

SIMULATE

For commissioning and test purposes the input value from the

Transducer Block in the Analogue Input Function Block AI-FB

can be modified. This means that the Transducer and AI-FB

will be disconnected.

DS-50 SRC 6 R/W

Disabled

OUT_UNIT_TEXT

If a specific unit of OUT parameter is not in the code list the

user has the possibility of writing the specific text in this para-

meter. The unit code is then equal to ”textual unit definition”.

Octet

string

SRC 16 R/W -

1 2 ... 20 21 22 23 24 25 26

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Wika T53 Manuel d'utilisateur Page 25

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