Rockwell Automation 1756-OF8H ControlLogix HART Analog I/O Modules - Manual (Page 185)

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 185
Tag Definitions Appendix A
Ch5Status SINT Binary Indicates various alarms on the analog signal. Also sets Ch5Fault.
Ch6Status SINT Binary Indicates various alarms on the analog signal. Also sets Ch6Fault.
Ch7Status SINT Binary Indicates various alarms on the analog signal. Also sets Ch7Fault.
ChxData REAL Float Analog value actually output in engineering units. This might be different than Output Tag ChxData
if the value exceeds the LowLimit or HighLimit, has a MaxRampRate applied, is being Held for
initialization, or controller in Fault or Program mode.
CSTTimestamp DINT[2] Decimal 64-bit coordinated system time timestamp in microseconds of the last output update. Timebase
synchronized with other modules in the rack.
RollingTimestamp INT Decimal 16 bit timestamp in milliseconds. Timebase local to the 1756-OF8H module.
HART AB:1756_OF8H_HARTData:I:1, Contains HART field device health and dynamic process variables
This applies to AB:1756_OF8H_HARTPV:I:1 only; for details on what appears in the variables, see the Module-defined
Data Type: AB:1756_OF8H_HARTData:I:1 table
Ch0DeviceStatus AB:1756_OF8H_HARTStatus_Struct:I:1, Channel 0 HART Device status info.
Init BOOL Decimal Searching for or Initializing HART device.
If this is 0 and Fail is 1, then HART is not enabled on this channel.
If both are 1, then 1756-OF8H is sending out HART messages attempting to establish
communication with a HART device.
Fail BOOL Decimal HART communication failure or device not found or HART not enabled.
If this bit is 1, none of the other data in the HART part of the input tag is valid.
(HART. PVStatus will be set to 0 to also indicate this).
MsgReady BOOL Decimal Pass-through message reply is ready for query service.
CurrentFault BOOL Decimal Analog current measurement does not match the current the field device reported over HART
network.
ConfigurationChanged BOOL Decimal The field device configuration has changed and new field device configuration information can be
obtained from the 1756-OF8H module via CIP MSG GetDeviceInfo, which will clear this bit.
ResponseCode SINT Binary HART communication status byte or Response code from a recent HART reply. See Response Code
and Field Device Status on page 195 for more information.
FieldDeviceStatus SINT Binary HART device status byte from a recent HART reply. Indicates the health of the HART field device.
See
Field Device Status Bit Mask Definitions on page 196 for more information.
PVOutOfLimits BOOL Decimal The primary variable is beyond its operating limit.
VariableOutOfLimits BOOL Decimal A device variable not mapped to the PV is beyond its operating limits.
CurrentSaturated BOOL Decimal The loop current has reached its upper or lower endpoint limit and cannot increase or decrease
any further.
CurrentFixed BOOL Decimal The loop current is being held at a fixed value and is not responding to process variations.
MoreStatus BOOL Decimal More status information is available via command 48, ‘Read Additional Status’ information.
ColdStart BOOL Decimal A power failure or device reset occurred.
Changed BOOL Decimal An operation was performed that changed the device’s configuration.
Malfunction BOOL Decimal The device detected a serious error or failure that compromises device operation.
ExtDeviceStatus SINT Binary Extended device status byte.
Maintenance
Required BOOL Decimal Maintenance is needed.
DeviceVariableAlert BOOL Decimal Device variable alert.
PowerLow BOOL Decimal Low power.
Ch1DeviceStatus AB:1756_OF8H_HARTStatus_Struct:I:0, Channel 1 HART Device status information.
Ch2DeviceStatus AB:1756_OF8H_HARTStatus_Struct:I:0, Channel 2 HART Device status information.
Table 68 - Analog Only (AB:1756_OF8H_HARTPV:I:1)
Member Name Type Style Description