Emerson Fisher FIELDVUE DVC6000f, Instruction Manual

Page: 74 / 384

DVC6000f Digital Valve Controllers
December 2009 4-14
Table 4-3. Resource Block Parameter Definitions (Continued)
Label
PARAMETER_NAME
Description
Initial
Value
Range Mode
RO /
RW
Index
Number
Cycle Type
CYCLE_TYPE
19 RO NA 0: Scheduled 0: 1
Data Type: Bit String
0 = Inactive
1 = Active
Identifies the block execution methods
available for this resource, may be scheduled,
completion of block execution
Cycle Selection
CYCLE_SEL
20 ALL 0: Scheduled 0: 0
Data Type: Bit String
0 = Inactive
1 = Active
Identifies the block execution method selected
for this resource.
Minimum Cycle Time
MIN_CYCLE_T
21 RO NA 3200 3200
Data Type: Unsigned32
Time duration of the shortest cycle interval (in
1/32 millisecond) of which the resource is
capable. In the digital valve controller this value
is fixed at 3200 (100 milliseconds).
Memory Size
MEMORY_SIZE
22 RO NA 45 45
Date Type: Unsigned16
Memory, in kilobytes, available for additional
function blocks. Because no additional function
blocks may be added to DVC6000f
instruments, this parameter value is fixed at 45.
Nonvolatile Cycle Time
NV_CYCLE_T
23 RO NA Positive 576,000
Date Type: Unsigned32
This parameter identifies the minimum time
interval (in 1/32 milliseconds) between copies
of NV class data to NV memory. NV memory is
updated only if there has been a change in the
dynamic value. The last value saved in NV
memory will be available for the restart
procedure or a power cycle. A non-zero value
regulates the frequency of writes, thus
protecting the life span of the device. If the
value is zero, data will never be automatically
copied. Changes made by other than
publishing to NV parameters will be copied to
non-volatile memory immediately. For
DVC6000f instruments, this parameter value is
fixed at 576,000 (18 seconds).
Free Space
FREE_SPACE
24 RO NA 0 to 100% 0
Data Type: Float
Percent of memory available for additional
function blocks (see also MEMORY_SIZE).
Because no additional function blocks may be
added to DVC6000f instruments, this
parameter value is fixed at 0.
Free Time
FREE_TIME
25 RO NA 0 to 100% 0
Data Type: Float
Percent of block processing time that is free to
process additional blocks. Because no
additional function blocks may be added to
DVC6000f instruments, this parameter value is
fixed at 0.
RCAS Timeout
SHED_RCAS
26 RW ALL Positive 640000
Date Type: Unsigned32
Time duration (in 1/32 millisecond) at which to
give up on computer writes to function block
RCAS parameters. If this time is exceeded
then the function block will change to a mode
other than RCAS based on the SHED_OPT
parameter setting. Shed from RCAS mode
never happens when SHED_RCAS is set to
zero.
ROUT Timeout
SHED_ROUT
27 RW ALL Positive 640000
Data Type: Unsigned32
Time duration (in 1/32 millisecond) at which to
give up on computer writes to function block
ROUT parameters. If this time is exceeded
then the function block will change to a mode
other than ROUT based on the SHED_OPT
parameter setting. Shed from ROUT mode
never happens when SHED_ROUT is set to
zero.
−
Continued
−
4