Emerson FIELDVUE DVC6200f, Instruction Manual

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DO Function Block
November 2010 183
DO Function Block Parameter List
Read/Write Capability: RO
−
Read Only, RW
−
Read Write
Mode: The block mode(s) required to write to the parameter
Double indentation and shaded Index Number indicates sub-parameter
Table 4-72. Discrete Output Function Block Parameter Definitions
Label
PARAMETER_NAME
Index
Number
RO /
RW
Mode Range Initial Value Description
Static Revision
ST_REV
1 RO N/A 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, 5: LO, 4: MAN, 3: AUTO
2: CAS, 1: RCAS
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
AUTO-CAS,
AUTO-RCAS 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
OOS+MAN+
AUTO+CAS
+RCAS
NORMAL
5.4 RW ALL AUTO+CAS
Block Error
BLOCK_ERR
6 RO N/A
1: Block Configuration
Error
3: Simulate Active
4: Local Override
5: Device Fault State
Set
7: Input Failure / Bad
PV Status
8: Output Failure
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 Discrete
PV_D
7 RO N/A
PV_D Status set equal
to Readback_D Status
Dynamic
Data Type: DS-66
The discrete process variable calculated from
READBACK_D.
Setpoint Discrete
SP_D
8
OOS
MAN
AUTO
PV_STATE
Data Type: DS-66
The discrete target block output value (set point).
Output Discrete
OUT_D
9 MAN OUT_STATE
Data Type: DS-66
Position target of valve. 0=closed, 1=open, 2
−
100
position the value in 5% steps.
Simulate Discrete
SIMULATE_D
10
Data Type: DS-83
Allows the transducer discrete input or output to
the block to be manually supplied when simulate is
enabled. When simulation is disabled, the simulate
value and status track the actual value and status.
SIMULATE_STATUS 10.1 ALL 0
SIMULATE_VALUE 10.2 ALL 0
TRANSDUCER_STATUS
10.3 RO 0
TRANSDUCER_VALUE 10.4 RO 0
ENABLE/DISABLE 10.5 ALL
0=Not initialized
1=Simulation Disabled
2=Simulation Active
1
−
Continued
−
4