Siemens SITRANS TH400 PROFIBUS PA, Configuration Manual, Page: 45 / 48

Analogue Input Blocks, PROFIBUS
4.2 Analogue Input Blocks (PA Slot 1 & 2) Parameter List, PROFIBUS
SITRANS TH400 PROFIBUS® PA
Configuration Manual, 02/2007, A5E01039143-01
45
4.2 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 1
Static Revision. Counter incremented with every parameter
configuration change.
Unsigned
16
N 2 RO 0
TAG_DESC 2 A user-supplied description of the block.
Octet
string
SRC 32 R/W “ “
STRATEGY 3
Grouping of Function Block. The STRATEGY field can be used
to group blocks.
Unsigned
16
SRC 2 R/W 0
ALERT_KEY 4
Contains the identification number of the plant unit. It helps to
identify the location (plant unit) of an event.
Unsigned
8
SRC 1 R/W 0
TARGET_MODE 5
Contains desired mode normally set by a control application or
an operator.
Unsigned
8
SRC 1 R/W -
MODE_BLK 6
Contains the current mode and the permitted and normal mode
of the block.
DS-37 D 3 RO
128,152
, 8
ALARM_SUM 7 Contains the current states of the block alarms. DS-42 D 8 RO 0;0;0;0
BATCH 8
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 identify the
current batch in case of alerts.
DS-67 SRC 10 R/W 0;0;0;0
OUT 10
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
RO
**)
Measur
ed of
the
variable
state
PV_SCALE 11
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.
2 * Float SRC 8
R/W 100; 0
OUT_SCALE 12
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.
Unsigned
8
SRC 1 R/W 0
CHANNEL 14
Reference to the active Transducer Block which provides the
measurement value to the Function Block.
Unsigned
16
SRC 2 R/W
1 : 281
2 : 283
PV_FTIME 16
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 17
Defines the reaction of the device if a fault is detected. The
calculated ACTUAL MODE remains in AUTO.
Unsigned
8
SRC 1 R/W 1
FSAFE_VALUE 18
Default value for the OUT parameter, if sensor or sensor
electronic 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