Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
147
Table B‐42. Arithmetic Function Block Parameter Definitions
Label
PARAMETER_NAME
Index
Number
RO /
RW
Block
Mode
Range Initial Value Description
Static Revision
ST_REV
1 RO NA 0 to 65535 0
Data Type: Unsigned16
The revision level of the static data associated
with the function block. The revision value will
be incremented each time a static parameter
value in the block is changed.
Tag Description
TAG_DESC
2 RW ALL 7 bit ASCII Spaces
Data Type: Octet String
The user description of the intended
application of the block.
Strategy
STRATEGY
3 RW ALL 0 to 65535 0
Data Type: Unsigned16
The strategy field can be used to identify
grouping of blocks. This data is not checked or
processed by the block.
Alert Key
ALERT_KEY
4 RW ALL 1 to 255 0
Data Type: Unsigned8
The identification number of the plant unit.
This information may be used in the host for
sorting alarms, etc.
Block Mode
MODE_BLK
5
Data Type: DS‐69
Valid Bits: 7:OOS, 4:MAN, 3:AUTO
The actual, target, permitted, and normal
modes of the block.
Target: The requested block mode
Actual: The current mode of the block
Permitted: Allowed modes for Target
Normal: Most common mode for Target
TARGET 5.1 RW ALL
OOS
MAN
AUTO
OOS until
block is
configured,
then last valid
target
ACTUAL 5.2 RO ALL OOS
PERMITTED 5.3 RW ALL OOS+MAN+AUTO
OOS+MAN+A
UTO
NORMAL 5.4 RO ALL AUTO
Block Error
BLOCK_ERR
6 RO NA
Defined Bits
1: Block Configuration
Error
3: Simulate Active
7: Input Failure / Bad PV
Status
14: Power‐up
15: Out‐of‐Service
Dynamic
Data Type: Bit String
0=Inactive
1=Active
The summary of all configuration or system
errors associated with the block.
Process Value
PV
7 RO NA
The process variable used in block execution
and alarm limit execution.
Output
OUT
8
OOS
MAN
The analog output value and status. The
number of outputs is an extensible parameter
in some blocks.
PRE_OUT
9 The pre‐trip limit from SP or zero.
Process Value Scale
PV_SCALE
10
The high and low scale values, engineering
units code, and number of digits to the right of
the decimal point associated with OUT.
Output Range
OUT_RANGE
11 ALL 0
Data Type: Unsigned16
Range of the output.
Grant Deny
GRANT_DENY
12
Data Type: DS‐70
Options for controlling access of host
computers and local control panels to
operating, tuning, and alarm parameters of
the block.
GRANT: 0=NA, 1=granted
DENY: 0=NA, 1=denied
GRANT 12.1 ALL
0: Program
1: Tune
2: Alarm
3: Local
All bits:0
DENY 12.2 ALL All bits: 0
Input Options
IO_OPTS
13
Sets the options for using IN, IN_LO, IN_1,
IN_2, and IN_3 when any are either Bad or
Uncertain.
Input
IN
14 ALL
Status
BAD:
NC:
const
Data Type: DS‐65
The analog input value and status. The
number of inputs is an extensible parameter in
some function blocks.
Value 0
-Continued-