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182 Model 2700 Transmitter with PROFIBUS-PA
Model 2700 PROFIBUS Block Parameters
F.4.10 AO function block parameters
Table F-15 lists the parameters for the AO function blocks.
Table F-15 AO function block parameters
Index Parameter Mnemonic Definition Message
Ty pe
Data Type/
Structure
Size Store
/Rate
(HZ)
Default
Value
Access Enumerated List of
Values / Range
Modbus
Register / Coil
Standard PA parameters
16 BLOCK_OBJECT This object contains the
characteristics of the block
RECORD DS-32 20 S ---- R NA NA
17 ST_REV A block has static block
parameters that are not
changed by the process.
Values are assigned to this
parameter during the
configuration of optimization.
The value of ST_REV
increases by 1 after every
change of a static block
parameter.
SIMPLE Unsigned16 2 N 0 R NA NA
18 TAG_DESC Every block can be assigned
a textual TAG description.
The TAG_DESC must be
unambiguous and unique in
the field bus system.
SIMPLE OCTET
STRING
32 S ‘ ’ R/W NA NA
19 STRATEGY Grouping of function block.
The STRATEGY field can be
used to group blocks.
SIMPLE Unsigned16 2 S 0 R/W NA NA
20 ALERT_KEY This parameter contains the
identification number of the
plant unit.
SIMPLE Unsigned8 1 S 0 R/W NA NA
21 TARGET_MODE This parameter contains
desired mode normally set by
a control application of an
operator. The modes are
valid alternatively only, i.e.
only one mode can be set at
one time. A write access to
this parameter with more than
one mode is out of the range
of the parameter and has to
be rejected.
SIMPLE Unsigned8 1 S Auto
(0x08)
R/W 0x08 – Auto
0x10 – Manual
0x80 – OOS
R-2295
22 MODE_BLK This parameter contains the
current mode and the
permitted and normal mode
of the block.
RECORD DS-37 3 D --- R NA R-2296
23 ALARM_SUM This parameter contains the
current states of the block
alarms.
RECORD DS-42 8 D 0,0,0,
0
RNA NA
24 BATCH This parameter is intended to
be used in Batch applications
in line with IEC 61512
Part1. Only Function Blocks
carry this parameter. There is
no algorithm necessary
within a Function Block.
RECORD DS-67 10 S 0,0,0,
0
RW NA NA
AO Function Block Standard Parameters
25 SP
(DD Name: AO Set Point)
Set point. RECORD 101 5 D ---- R/W NA NA
26 RESERVED
27 PV_SCALE
(DD Name: AO PV Scale)
Conversion of the PV in
engineering units to PV in
percent as the input value of
the
Function Block.
RECORD DS-36 11 S 100,0
%
R/W NA R-2298 (only
units)
28 READBACK
(DD Name: AO ReadBack
Value)
The actual position of the final
control element within the
travel span (between
OPEN and CLOSE position)
in units of PV_SCALE.
RECORD 101 5 D ---- R NA NA
29 RESERVED
30 RESERVED
31 RESERVED
32 RESERVED
33 RESERVED
34 RESERVED
35 RESERVED
36 RESERVED