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Section
5-1
5 Resource Block
OVERVIEW Section 5 contains information on the Model 8800C Flowmeter resource
block. Descriptions of all resource block parameters, errors, and
diagnostics are included. Also the modes, alarm detection, status
handling, Virtual Communication Relationships (VCRs), and
troubleshooting are discussed.
Definition The resource block defines the physical resources of the device,
including type of measurement, memory, etc. The resource block also
handles functionality, such as shed times, that is common across
multiple blocks. The block has no linkable inputs or outputs and it
performs memory-level diagnostics.
PARAMETERS AND
DESCRIPTIONS
Table 5-1 lists all of the configurable parameters of the resource block,
including the descriptions and index numbers for each parameter.
TABLE 5-1. Resource Block
Parameters.
Parameter
Index
Number
Description
ACK_OPTION 38 ACK_OPTION is a selection of whether alarms associated with the function block will be
automatically acknowledged.
ALARM_SUM 37 This parameter shows the current alert status, unacknowledged states, unreported
states, and disabled states of the alarms associated with the function block. In the Model
8800C Flowmeter, the two resource block alarms are write alarm and block alarm.
ALERT_KEY 04 ALERT_KEY shows the identification number of the plant unit. This information may be
used in the host for sorting alarms, etc.
BLOCK_ALM 36 The block alarm is used for all configuration, hardware, connection failure, or system
problems in the block. The cause of the alert is entered in the subcode field. The first
alert to become active will set the active status in the status parameter. As soon as the
unreported status is cleared by the alert reporting task, another block alert may be
reported without clearing the active status, if the subcode has changed.
BLOCK_ERR 06 This parameter reflects the error status of the hardware or software components
associated with a block. It is a bit string, so multiple errors may be shown.
CONFIRM_TIME 33 This parameter represents the minimum time between retries of alert reports.
MESSAGE_DATE 52 MESSAGE_DATE is the date associated with the MESSAGE_TEXT parameter.
SUMMARY_STATUS 51 This parameter represents an enumerated value of repair analysis.
CYCLE_SEL 20 This parameter is used to select the block execution method for this resource. The Model
8800C Flowmeter 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.
CYCLE_TYPE 19 This parameter identifies the block execution methods available for this resource.
DD_RESOURCE 09 This string identifies the tag of the resource that contains the device description for this
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.
DEFINE_WRITE_LOCK 55 DEFINE_WRITE_LOCK is the enumerated value describing the implementation of the
WRITE_LOCK.
DETAILED_STATUS 50 This parameter represents the additional status bit string.