AO Function Block
March 2006
5-71
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 5-23 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 5-23. 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 5-39.
7
Input failure/process variable has Bad status - PV has
bad status and Feature Select in the Resource block has
the Out Readback bit set.
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 5-39.
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.
5
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