Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
108
Discrete Input Function 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‐20. Discrete Input 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
This parameter reflects the error status
associated with the hardware or software
components associated with a block. Multiple
errors may be shown..
Process Value Discrete
PV_D
7 RO NA
PV_D Status set equal to
Field_Val_D Status
Dynamic
Data Type: DS‐66
The process variable used in block execution.
Value is converted from Readback to show the
actuator position in the same units as the set
point value.
Output Discrete
OUT_D
8
OOS
MAN
OUT_STATE
Data Type: DS‐66
The primary discrete value calculated as a
result of executing the function.
-Continued-