Справочник Пользователя для Emerson Process Management 3420

June 2013

3-9000-743 Rev S

6.5.5

GC data validity

The GC-read gas property data validity is indicated by the 

AreGasPropertiesInvalidGC data 

point. The data is considered invalid if any of the conditions listed in 

 is true. These 

conditions are indicated by the Daniel MeterLink 

 page 

 indicator.

6.5.6

GC alarm handling

The following data points are included in the meter’s alarm log (

GasPropertiesInvalidGC, IsGCAlarmPresent, IsGCCommErr, GCCommStatus, and 

IsGCDataErr.

19

GC response message (RTU protocol) incomplete.

20

GC gas property data spans more than one update.

Invalid or expired GC feature key (

).

Option Board Port C is not available (Option Board probably disconnected).

Option Board Port C improperly configured (such as if configured without using the Daniel 
MeterLink Field Setup Wizard).

Unrecognized gas component ID.

Specified gas stream (

) not found within the specified period (

).

GC reported alarm (GC Alarm1 bits 14 and/or 15 set, GC Alarm2 bits 0, 1, 2, and/or 3 set).

Not presently used - reserved for future use.

Refer to communication error conditions listed in 

.

The total unnormalized gas composition mole percentage is not within [85%, 115%].

An individual gas composition mole percentage is not within [0%, 100%].

The specific gravity is not within [0.2, 0.8].

The heating value is greater than 50 kJ/dm

3

.