Honeywell ST700 User Manual page 64

Parameter
XD_SCALE
OUT_SCALE
GRANT_DENY
IO_OPTS
STATUS_OPTS
CHANNEL
L_TYPE
LOW_CUT
PV_FTIME
FIELD_VAL
UPDATE_EVT
BLOCK_ALM
ALARM_SUM
ACK_OPTION
Page 50 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide
Elements used to display the value obtained from the transducer block.
The elements are:
•
High and low scale values (EU_100 and EU_0).
•
Engineering units to display the value (UNITS_INDEX).
•
Decimal places to display the value (DECIMAL).
The high and low scale values, engineering units code, and number of
digits to the right of the decimal point associated with OUT.
Normally, the operator has permission to write to parameter values, but
Program or Local remove that permission and give it to the host controller
or a local control panel.
Allows the selection of input/output options used to alter the PV. Low
cutoff enabled is the only selectable option.
Helps select options for status handling and processing. The supported
status options for the AI block are Propagate Fault Forward Uncertain, if
Limited Bad, if Limited and Uncertain if MAN mode.
The CHANNEL value is used to select the measurement value. Configure
the CHANNEL parameter before configuring the XD_SCALE parameter.
The state (Direct or Indirect) values that are passed from the transducer
block to the AI block.
When L_TYPE = Direct, the values are passed directly from the
transducer block to the AI block. (No units conversion.)
When L_TYPE = Indirect, values from the transducer block are in different
units, and must be converted either linearly (Indirect) or in square root (Ind
Sqr Root) using the range defined by the transducer and the OUT_SCALE
range.
If percentage value of transducer input fails below this, PV = 0.
The time constant of the first-order PV filter. It is the time required for a
63% change in the IN value.
The value and status from the transducer block or from the simulated
input when simulation is enabled.
This alert is generated by any change to the static data.
The block alarm is used for all configuration, hardware, and 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 sets 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.
The summary alarm is used for all process alarms in the block. The cause
of the alert is entered in the subcode field. The first alert to become active
sets 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.
Used to set AUTO acknowledgment of alarms.
Description
Revision 2.0