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App.-1

IM 01R01A15-01EN

2nd Edition : 2013.11.07-00

Appendix A Aggregated Field Diagnostic

Alarms for FOUNDATION Fieldbus

Table Appendix A-1 describes all of the 32 Aggregated Field Diagnostic Alarms used for

Yokogawa products.

Table Appendix A-1 Aggregated Field Diagnostic Alarms (32-bit)

Alarm bit

Initial alarm

category

Label Description

31 F Electronics failure

An electric/electronic failure such as amplifier breakdown may have

occurred.

30 F Sensor/Actuator failure A sensor/actuator failure may have occurred.

29 F Potential failure

A device failure may have occurred, or abnormal settings, dirt, poor contact

of wiring and connectors, or poor board installation may have occurred.

28 F (Device specific failure alarm) Device-specific failure

27 F (Device specific failure alarm) Device-specific failure

26 F Backup function in operation

A breakdown has occurred in at least one system of redundant sensors.

The backup sensor is operating normally.

25 - (Reserved) (Reserved)

24 C Firmware update error

A firmware update error has occurred. The operation is being covered by

the existing firmware.

23 C Communication configuration error Communication setting is improper.

22 C Non-operating-state

Non-routine operations such as initialization, calibration, testing, or

maintenance are in progress.

21 C Calibration warning

The device is running with existing settings or abnormal calibration values

because the calibration was performed during an alarm condition.

20 C Device configuration error The settings of sensors or actuators are improper.

19 C Function restricted The device is running partially.

18 C Simulation mode The device is running in the simulation mode.

17 C Manual mode The device is running in the manual mode.

16 C Function Block notice A function block is in the “O/S” or “Unscheduled” state.

15 C

(Device specific function check

Device-specific function check alarm

14 - (Reserved) (Reserved)

13 S Sensor/Actuator out of range

The measured value of the sensor or the operating point of the actuator is

out of range.

12 S Out of operating limit The environment or operating condition is out of the specification.

11 S

(Device specific out of specification

alarm)

Device-specific out-of-spec alarm

10 - (Reserved) (Reserved)

9 M Temporal decrease of value quality

Although the accuracy satisfies the specification, the measured values are

temporarily unreliable due to degradation.

8 M

Deterioration estimated by Time

Based　Maintenance

The operation time or the number of operations has exceeded the limit.

7 M

Deterioration estimated by Condition

Based Maintenance

The internal algorithm has detected an abnormality.

6 M

(Device specific maintenance

request alarm)

Device-specific “maintenance request” alarm

5 M

(Device specific maintenance

request alarm)

Device-specific “maintenance request” alarm

4 - (Reserved) (Reserved)

3 C Optional function configuration error

A setting of sub-functions is abnormal although it will not affect the main

measuring functions. Masking this alarm does not affect the operation of

the main functions.

2 - Alarm related information Supplementary information is displayed.

1 - Process alarm

A process alarm has occurred. This alarm may be caused by an

abnormality of devices or peripheral devices.

0 - CHECK CHECK

1 2 ... 15 16 17 18 19 20 21 22

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