HART devices and the DeltaV System > HART error conditions for CHARMs I/O

HART field device status errors (CHARMs I/O)

Tables A and B below list the values expected for diagnostic parameters when the following field device status errors are detected by DeltaV Diagnostics:

  • Device malfunction

  • Configuration changed

  • Cold start

  • More status avalable

  • Loop current fixed

  • Loop current

  • Non-Primary Variable out of limits

  • Primary Variable out of limits

Table: HART field device status errors (CHARMs I/O) -Table A
Parameter Device malfunction Configuration changed Cold start More status available

OINTEG

(HART integrity)

BAD(1)

HINTEG

TRUE

DEV_MALFUNC

TRUE

CONFIG_CHANGED

TRUE

COLD_START

TRUE

MORE_STATUS

TRUE

LOOP_FIXED

LOOP_SAT

NPV_PAST_LIM

PV_PAST_LIM

HART_FIELD_VAL(2)

BadDeviceFailure(1)

HART_PV

BadDeviceFailure(1)

HART_SV

BadDeviceFailure(1)

HART_TV

BadDeviceFailure(1)

HART_FV

BadDeviceFailure(1)

HART_DV_SLOT0(3)

BadDeviceFailure(1)

HART_DV_SLOT1(3)

BadDeviceFailure(1)

HART_DV_SLOT2(3)

BadDeviceFailure(1)

HART_DV_SLOT3(3)

BadDeviceFailure(1)

(1) Unless ignored by configuration.
(2) Any condition that causes the analog value FIELD_VAL_PCT to have bad integrity or status will also cause HART_FIELD_VAL to have bad integrity and status.
(3) This channel parameter is not supported in devices implementing the HART Protocol prior to revision 7. Therefore, any HART field device status error appearing in DeltaV Diagnostics for a device that implements an earlier level of the HART protocol can be disregarded.
Table: HART field device status errors (CHARMs I/O) -Table B
Parameter Loop current fixed Loop current saturated NPV out of limits PV out of limits

OINTEG

BAD(1)

BAD(1)

BAD(1)

BAD(1)

HINTEG

TRUE

TRUE

TRUE

TRUE

DEV_MALFUNC

CONFIG_CHANGED

COLD_START

MORE_STATUS

LOOP_FIXED

TRUE

LOOP_SAT

TRUE

NPV_PAST_LIM

TRUE

PV_PAST_LIM

TRUE

HART_FIELD_VAL(2)

BadOutOfServiceSpecific(1)

BadNonSpecific(1)

BadNonSpecific(1)

HART_PV

BadOutOfServiceSpecific(1)

BadNonSpecific(1)

BadNonSpecific(1)

HART_SV

BadNonSpecific(1)

HART_TV

BadNonSpecific(1)

HART_FV

BadNonSpecific(1)

HART_DV_SLOT0(3)

BadNonSpecific(1)

HART_DV_SLOT1(3)

BadNonSpecific(1)

HART_DV_SLOT2(3)

BadNonSpecific(1)

HART_DV_SLOT3(3)

BadNonSpecific(1)