Emerson IEC 62591 Instruction Manual page 31

IEC 62591 Wireless Interface Instruction Manual (for ROC800-Series and FloBoss 107)
Revised June-2018
Field
Process Variables
Enable Fault
Detection
Dynamic Variables
Configuration and Commissioning
Description
Displays the value, health, and status for the primary
(PV), secondary (SV), tertiary (TV), and quaternary
(QV) dynamic variables. For each variable, two
status fields display to the right of the Value field.
The upper status field is the Process Data Status,
indicating the overall status of the process variable.
Possible values for this field are Good,
Manual/Fixed, Poor Accuracy, and Bad. The lower
status field is the Limit Status, indicating if the
process variable is responding to changes. Possible
values for this field are Constant, High Limited, Low
Limited, and Not Limited.
The module returns four additional bits, but these are
not displayed through ROCLINK. Bit 3 indicates the
More Device Variable Status Available. Bits 2
through 0 indicate the Device Family Specific Status.
Use TLPs to retrieve these additional bits for the PV
Status (177,x,60), SV Status (177,x,61), TV Status
(177,x,62), and QV Status (177,x,63). For more
information, refer to the Command Summary
Specification (HCF_SPEC-99), available from the
HART Communication Foundation.
Check to enable fault detection on the process
variables. If enabled and the system detects a fault,
the system marks the field in red and displays NaN
(not a number).
Note: You enable fault detection individually for each
process variable. This field applies only to the
FB107.
Defines the slot assignment and associated value for
up to four slot-based variables.
Each wireless transmitter contains up to 250 slots
able to store variable information (such as
temperature, pressure, scaling factors, altitude, flow,
and so on). Each transmitter manufacturer defines
which slots contain what information. Refer to the
documentation provided with the transmitter or to the
manufacturer's website for a complete list of slot
assignments.
Note: WirelessHART conventions require that all
manufacturers reserve slots 246 through 249
for the dynamic variables PV, SV, TV, and
FV, respectively. Slot 250 is also reserved as
permanently unassigned, and does not
accumulate values.
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