Field Diagnostics; Table 5: Diagnostic Definitions - Honeywell ST700 User Manual

Field Diagnostics

The Resource block acts as a coordinator for alarms. There are four alarm parameters: Fail
alarm, Offspec alarm, Maintenance alarm, and Check alarm. It contains information of
device errors that are detected by the transmitter. Based on the error detected, the device
provides the recommended actions; it is a read only parameter. It displays the
recommended action text for the reported alarms.
Name
Maintenance
Off Indicates if the device is operating outside its specified range or internal
Specification diagnostics indicate deviations from measured or set values due to internal
problems in the device or process characteristics.
Check Output signal temporarily invalid due to on-going work on the device.
Function
Failed
FAILED_ALARMS
Failed alarms indicate a failure within a device that makes the device or some part of the
device non-operational. This implies that the device needs repair and must be fixed
immediately.
•
FAILED_MAPPED parameter contains a list of failures in the device which makes
the device non-operational that causes an alarm. There are four parameters mapped by
default with FAILED_MAPPED: Meterbody fault, Communication board fault, and
No communication with meterbody.
•
FAILED_MASK parameter masks any of the failed conditions listed in
FAILED_MAPPED. A bit on means that the condition is masked out from alarming
and is not reported.
•
FAILED_PRI parameter designates the alarming priority of FAILED_ALM. The
default is 0.
•
FAILED_ACTIVE parameter displays the alarms that are active.
•
FAILED_ALM parameter indicates a failure within a device which makes the device
non-operational.
Page 18 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide

Table 5: Diagnostic Definitions

Although the output signal is valid, the wear reserve is nearly exhausted or a
function is soon restricted due to operational conditions. For example, build-
up of deposits.
Output signal invalid due to malfunction in the field device or its peripherals.
Description
Revision 2.0