Rockwell Automation 1756-OF8H ControlLogix HART Analog I/O Modules - Manual (Page 174)

174 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Appendix A Tag Definitions
Analog Only
This table describes the input tags available in the Analog Only data format.
Ch14Config AB:1756_IF16H_ChConfig_Struct:C:0
Ch15Config AB:1756_IF16H_ChConfig_Struct:C:0
PassthroughHandle
Timeout INT Decimal Seconds to keep a reply to a HART pass-through service request before discarding; 15 seconds
is recommended.
Table 62 - Configuration (AB:1756_IF16H:C:0)
Member Name Type Style Description
Table 63 - Analog Only (AB:1756_IF16H_Analog:I:0)
Member Name Type Style Description
ChannelFaults
(bits 0…15) INT Binary Indicates a problem with analog data on Channel x or broken communication between the Logix
controller and the 1756-IF16H module.
Example: Set if analog signal is larger than 20 mA.
ChxxFault
(Ch00…Ch15) BOOL Decimal ChannelFaults.0…ChannelFaults.15
Module Status SINT Binary
Calibrating BOOL ModuleStatus.0, Calibration in progress
UpdatedStatusReady BOOL ModuleStatus.1, 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 .
ModuleFaults
(bits 0…5 not used) SINT Binary
CalFault BOOL Decimal ModuleFaults.6, 1756-IF16H Module Calibration Failed.
AnalogGroupFault BOOL Decimal ModuleFaults.7, Indicates a fault has occurred on any channel (any of ChannelFaults).
BrokenWireFaults
(bit 0…15) INT Binary 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. If configured for 4…20 mA, a broken wire fault
will set this bit.
ChxxBroken Wire BOOL Decimal BrokenWireFaults.0…BrokenWireFaults.15
HARTFaults
(Ch0…Ch15) INT Binary 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.
ChxxHARTFault BOOL Decimal HARTFaults.0…HARTFaults.15
Ch00Status SINT Binary Indicates various alarms on the analog signal. Also sets Ch00Fault.
Ch00Overrange BOOL Ch00Status.5
Analog signal is greater than or equal to the maximum detectable signal. Because the signal cannot
be measured, it may be significantly above the maximum value
Ch00Underrange BOOL Ch00Status.6
Analog signal is less than or equal to the minimum detectable signal. Because the signal cannot be
measured, it may be significantly below the minimum value
Ch00CalFault BOOL Ch00Status.7
Set if an error occurs during calibration for Ch00, causing a bad calibration. Also sets CalFault
Ch01Status SINT Binary Indicates various alarms on the analog signal. Also sets Ch01Fault.