Flowserve 3400IQ Digital Positioner - Manual (Page 63)

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Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
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Table 8.11 Table Description for Block Parameter Summary
Column Title Attribute Meaning
Use/Model Use and Model Reference (The letter for
use is separated by a slash from the model name.)
The manner in which the parameter will participate in
inter-device communications.
Use is defined as:
I - Function block Input. The input may be connected
to a function block output or used as a constant.
O - Function block Output. An output may be
referenced by other function block inputs.
C - Parameter value Contained in the block,
available for interface (operation, diagnostic) and/or
configuration.
Model is:
The name of the parameter.
In this case, the attribute indicates that it is a
contained parameter and may not be referenced by
link objects for use as an input to function blocks.
Store Indicates the type of memory where the parameter is
stored:
S - Static. Writing to the parameter changes the static
revision counter ST_REV
N - Non-volatile. Parameter must be retained during
a power cycle. It is not under the static update code.
D - Dynamic. The value is calculated by the block, or
read from another block.
Size The number of octets.
Valid Range Range of valid values the parameter is restricted to for
use in the function block.
For bit strings:
0 (zero) is always valid as the state of a bit and is the
inverse of the described value.
For enumeration:
0 (zero) means that the value is invalid. This is
required for initialization of an un-configured block.
Plus or minus infinity (+INF or -INF) may be included
in the valid range to indicate that it is permissible to
use them to turn off a limit comparison, such as an
alarm limit.
Initial Value The value inserted when the block is created. All limits
are set to plus or minus infinity (+INF or -INF), which
is the same as no limit. All dynamic values are initial-
ized to zero as a result of a clear memory instruction.
Perm. Permission Defines the setting of the GRANT_DENY parameter
that allows write access to the parameter, for interface
devices that obey this parameter.
Mode Indicates the lowest priority target mode required to
allow a change to the parameter. The actual mode
must match the target mode, so that the block is not
in another mode than that chosen by the operator.
Scaling changes are protected by mode, because the
block may be using scaling to calculate its output.
Other DD handling for:
Positive
Ordered and
Read only.
NOTE: For parameters that are inputs:
If it is linked, it is read-only.
If it is not linked, it can be written to.
Range Check Flag to check that the value is within the valid range
given in the table.