Emerson FIELDVUE DVC6200f, Инструкция по эксплуатации

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AO Function Block
November 2010 103
Note
When simulate is active, the output
block no longer writes values to the
transducer block. If the Output Blk
Timeout period is exceeded, the
transducer block may move the valve
to the Zero Power Condition
depending on the configuration of the
Output Block Timeout Alert.
Application Information
The configuration of an AO function block and its
associated output channels depends on the specific
application. A typical configuration for the Analog
Output involves the following attributes:
PV_SCALE Set the range and engineering units
to values that correspond to the op-
eration range. For the digital valve
controller, PV_SCALE [11] is
typically set between 0 and 100%.
BKCAL_OUT If you are using the CAS_IN [17]
connector wired from another block,
wire the BKCAL_OUT [25] attribute
to the other block’s BKCAL_IN [27]
attribute.
IO_OPTS Set the type of tracking and action
upon fault state.
SHED_OPT Set the action to be taken when the
set point or output are not updated
in a remote mode.
Block Errors
Table 4-24 lists conditions reported in the
BLOCK_ERR [6] parameter. Conditions in italics are
not applicable for the AO block and are provided only
for your reference.
Table 4-24. BLOCK_ERR Conditions
Condition
Number
Condition Name and Description
0 Other (N/A)
1
Block Configuration Error - CHANNEL and SHED_OPT
set to 0
2 Link Configuration Error (N/A)
3
Simulate active - Simulation is enabled and the block is
using a simulated value in its execution.
4 Local Override - Device in fault state. Actual mode LO.
5
Device Fault State Set - AO block in fault state after
FSTATE_TIME because of Bad status or IFS substatus
on CAS_IN or Resource block commanded fault state.
6
Device Needs Maintenance Soon - Indicates a
Maintenance PlantWeb Alert condition is active if Block
Error Reporting is enabled. See page 70.
7 Input failure/process variable has Bad status (N/A)
8 Output failure - PV has bad status.
9 Memory Failure (N/A)
10 Lost Static Data (N/A)
11 Lost NV Data (N/A)
12 Readback Check Failed (N/A)
13
Device Needs Maintenance Now - Indicates Failed
PlantWeb Alert condition is active if Block Error Reporting
is enabled. See page 70.
14
Power Up - This condition exists after power up until
actual mode is not Out of Service.
15
Out of Service - The block is in Out of Service (OOS)
mode.
4