Emerson 8700 Series, Справочное руководство

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Reference Manual
00809-0100-4793, Rev CA
August 2004
Rosemount 8742C
C-2
RS_STATE 07 RS_STATE denotes the state of the function block application state machine.
TEST_RW 08 A parameter for a host to use to test reading and writing. Not used by the device at
all.
DD_RESOURCE 09 This string identifies the tag of the resource that contains the device description for
this resource.
MANUFAC_ID 10 Manufacturer identification number—used by an interface device to locate the DD
file for the resource (001151 for Rosemount).
DEV_TYPE 11 This parameter represents the manufacturer’s model number associated with the
resource—used by interface devices to locate the DD file for the resource
(Rosemount 8742C).
DEV_REV 12 This parameter represents the manufacturer revision number associated with the
resource—used by an interface device to locate the DD file for the resource.
DD_REV 13 DD_REV is a revision of the DD associated with the resource—used by an
interface device to locate the DD file for the resource.
GRANT_DENY 14 Options for controlling access of host computers and local control panels to
operating, tuning, and alarm parameters of the block (not used by the device).
HARD_TYPES 15 HARD_TYPES shows the types of hardware available as channel numbers. For
the Rosemount 8742C, this parameter is limited to scalar (i.e., analog) inputs.
RESTART 16 Allows a manual restart to be initiated. Several degrees of restart are possible:
1 Run: Nominal state when not restarting
2 Restart resource: Not used
3 Restart with defaults: Set parameters to default values (see
START_WITH_DEFAULTS below for which parameters are set).
4 Restart processor: Does a warm start of the central processing unit (CPU).
FEATURES 17 This parameter is used to show supported resource block options.
FEATURES_SEL 18 Used to show selected resource block options. The Rosemount 8742C Magnetic
Flowmeter Transmitter supports the following options:
Unicode: Tells the host to use unicode for string values
Reports: Enables alarms; must be set for alarming to work
Software Lock: Software write locking enabled but not active; WRITE_LOCK must
be set to activate
Hardware Lock: Hardware write locking enabled but not active; WRITE_LOCK
follows the status of the security switch
CYCLE_TYPE 19 This parameter identifies the block execution methods available for this resource.
CYCLE_SEL 20 This parameter is used to select the block execution method for this resource. The
Rosemount 8742C supports the following executions:
Scheduled: Blocks are only executed based on the schedule in FB_START_LIST.
Block Execution: A block may be executed by linking to another block’s completion.
MIN_CYCLE_T 21 Time duration of the shortest cycle interval of which the resource is capable.
MEMORY_SIZE 22 Available configuration memory in the empty resource. To be checked before
attempting a download.
NV_CYCLE_T 23 NV_CYCLE_T is the interval between which copies of nonvolatile (NV) parameters
are written to NV memory. Zero denotes that NV parameters are never written to
NV memory.
FREE_SPACE 24 This parameter represents the percent of memory available for further
configuration (zero in a preconfigured device).
FREE_TIME 25 This parameter represents the percent of the block processing time that is free to
process additional blocks.
SHED_RCAS 26 This parameter represents the time duration at which to give up on computer writes
to function block RCas locations.
SHED_ROUT 27 This parameter represents the time duration at which to give up on computer writes
to function block ROut locations.
FAIL_SAFE 28 Condition set by loss of communication to an output block, fault promoted to an
output block or physical contact. When FAULT_ STATE condition is set, then output
function blocks will perform their FAULT_ STATE actions.
SET_FSAFE 29 Allows the FAULT_ STATE condition to be manually initiated by selecting Set.
Index Number
Parameter Rev 5 Description