Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
92
PID Block Parameter List
D Read/Write Capability: RO ‐ Read Only, RW ‐ Read Write
D Mode: The block mode(s) required to write to the parameter
D Double indentation and shaded Index Number indicates sub‐parameter
Table B‐12. PID Function Block System Parameters 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 pa rameter 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 0 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, 6: IMAN, 5: LO, 4: MAN, 3:
AUTO, 2: CAS, 1: RCAS, 0: ROUT
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
CAS, RCAS, ROUT
OOS until
block is
configured,
then last valid
target
ACTUAL 5.2 RO ALL OOS
PERMITTED 5.3 RW ALL
OOS+MAN+AUTO+
CAS+RCAS+ROUT
OOS MAN,
AUTO CAS,
RCAS ROUT
NORMAL 5.4 RW ALL AUTO
Block Error
BLOCK_ERR
6 RO NA
Defined Bits
1: Block Configuration Error
4: Local Override
7: Input Failure/ Bad PV status
14: Power‐up
15: Out‐of‐Service
Dynamic
Data Type: Bit String
0 = inactive
1 = active
This parameter reflects the error status associated
with the hardware or software components
associated with a block. It is a bit string so that
multiple errors may be shown.
Process Value
PV
7 RO NA Dynamic
Data Type: DS‐65
The process variable used in block execution.
Setpoint
SP
8
OOS
MAN
AUTO
PV_SCALE +/‐ 10% Dynamic
Data Type: DS‐65
The target block setpoint value. It is the result of
setpoint limiting and setpoint rate of change
limiting.
Output
OUT
9
MAN
OOS
Status
OUT_SCALE +/‐ 10%
Dynamic
DS‐65
The block output value and status.
Value
Process Value Scale
PV_SCALE
10 OOS
EU at 100%
EU at 0%
Units index
Decimal
Point
100
0
%
2
Data Type: DS‐68
The high and low scale values, engineering units
code, and number of digits to the right of the
decimal point associated with PV.
Output Scale
OUT_SCALE
11 OOS
EU at 100%
EU at 0%t
Units index
Decimal
Point
100
0
%
2
Data Type: DS‐68
The high and low scale values, engineering units
code, and number of digits to the right of the
decimal point associated with OUT.
-Continued-