Owner manual

170 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Appendix A Tag Definitions
Analog and HART by Channel
Table 61 - Analog and HART by Channel (AB:1756-IF8H_AnalogHARTbyChannel:I:0)
Member Name Type Style Description
ChannelFaults
(Ch0…Ch7)
INT Binary Indicates a problem with analog data on Channel x or broken communication between the Logix
controller and the 1756-IF8H module.
Example: Set if analog signal is larger than 20 mA.
ChxFault BOOL ChannelFaults.x
ModuleFaults SINT Binary
CalFault BOOL Decimal ModuleFaults.1, 1756-IF8H module calibration failed.
Calibrating BOOL Decimal ModuleFaults.2, Calibration in progress.
UpdatedStatusReady BOOL Decimal ModuleFaults.3, Module has collected updated Additional Device Status from HART command 48.
This status can be retrieved by using the Read Additional Status service, 16#4C. For more
information about this service, see Read Additional Status (Service Code = 16#4C) on page 125
.
AnalogGroupFault BOOL Decimal ModuleFaults.7, Indicates a fault has occurred on any channel (any of ChannelFaults).
Ch0 AB:1756_IF8H_HARTDataAll_Struct:I:0, Channel 0 analog and HART data.
Data REAL Float Analog value in engineering units.
DeviceStatus AB:1756_IF8H_HARTStatusAll_Struct:I:0, Channel 0 HART Device status info.
HARTInit 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-IF8H is sending out HART messages attempting to establish
communication with a HART device.
HARTCommFail 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 are 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
the HART network.
ConfigurationChanged BOOL Decimal The field device configuration has changed and new field device configuration information can be
obtained from the 1756-IF8H module via CIP MSG GetDeviceInfo, which will clear this bit.
BrokenWire BOOL Decimal Indicates that current is not flowing through the module as expected. This might be caused by
broken wiring, RTB removal, or a powered-off field device.
HARTFault BOOL Decimal Indicates a problem with HART data from the field device on Channel x.
Examples are HART not enabled, HART device not connected, HART communication failure
due to noise.
The following Field Device Status conditions also cause this to be set: Device Malfunction,
PV Out of Limits, Loop Current Saturated, and Loop Current Fixed.
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.