Emerson Process Management 3400, 3410, 3420, 3422 Name, Value, screen, AlarmDef, AlarmDef, IsInactiveA, IsInactiveB, IsInactiveC, IsInactiveD, Bit Position, PropUpdtBatches, modify the Mark, PropUpdtBatches

	Reference, Installation, and Operations Manual	Upgrading a Mark II to a Mark III
3-9000-743 Rev S		June 2013

C.4.8 Inactive chords

The Mark II ChordInactv (bitfield) parameter is converted to the Mark IIIIsInactiveA...IsInactiveD data points as follows:Table C-1 Mark II chord inactive conversion to Mark III data points

Mark II ChordInactv		Mark III Data Point
Bit Position	Bit Value	Name	Value
0	0	IsInactiveA	0	(FALSE)
	1		1	(TRUE)
1	0	IsInactiveB	0	(FALSE)
	1		1	(TRUE)
2	0	IsInactiveC	0	(FALSE)
	1		1	(TRUE)
3	0	IsInactiveD	0	(FALSE)
	1		1	(TRUE)

C.4.9 AlarmDef

In the Mark II, the AlarmDef parameter is used for two purposes:

•It specifies the number of consecutive batches that a chord must be failed before the chord failure is indicated in the DataQlty register.

•It specifies the number of consecutive batches that all active chords must be without failure for updating the chord proportions.

The Mark III provides a separate data point for each of these purposes: AlarmDef for the first purpose and PropUpdtBatches for the second. Since the Mark III batch update period is much faster than that of the Mark II, the Daniel MeterLink configuration conversion feature does not modify the Mark III AlarmDef or PropUpdtBatches data points (which should be at default values). These points’ values can be read and modified via the Daniel MeterLink Edit/Compare Configuration screen.

Inactive chords 309