Owner manual

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 165
Tag Definitions Appendix A
Analog Only
This table describes the input tags available in the Analog Only data format.
HighSignal REAL Float Upper current value for scaling to engineering units. Default is 20 mA. Must be more than LowSignal
and less than or equal to the maximum Input Range. See Scaling to Engineering Units on page 98 for
more information.
LowEngineering REAL Float Measured quantity in engineering units that results in a signal level equal to LowSignal. See Scaling
to Engineering Units on page 98 for more information.
HighEngineering REAL Float Measured quantity in engineering units that results in a signal level equal to HighSignal. See Scaling
to Engineering Units on page 98 for more information.
LAlarmLimit REAL Float User value sets low limit that causes the module to trigger a low alarm.
HAlarmLimit REAL Float User value sets high limit that causes the module to trigger a high alarm.
LLAlarmLimit REAL Float User value sets low low limit that causes the module to trigger a low low alarm.
HHAlarmLimit REAL Float User value sets high high limit that causes the module to trigger a high high alarm.
AlarmDeadband REAL Float User value sets the alarm deadband that stipulates the deadband range for the alarm trigger point.
See Table 4
on page 58 for an illustration.
CalBias REAL Float Sensor Offset in engineering units added to the measured signal before reporting Ch0.Data.
Ch1Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch2Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch3Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch4Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch5Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch6Config AB:1756_IF8H_ChConfig_Struct:C:0
Ch7Config AB:1756_IF8H_ChConfig_Struct:C:0
PassthroughHandle
Timeout
INT Decimal Seconds to keep a reply to a HART pass-through service request before discarding.
15 seconds recommended.
PassthroughCmdFreq_14 BOOL Decimal Selects the policy for sending HART pass-through messages. See Pass-through Setting, Ratio, and
Priority on page 101
PassthroughCmdFreq_15 BOOL Decimal
Table 58 - Configuration (AB:1756_IF8H:C:0)
Member Name Type Style Description
Table 59 - Analog Only (AB:1756_IF8H_Analog:I:0)
Member Name Type Style Description
ChannelFaults
(bit0…15
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
(Ch0…Ch7)
BOOL Decimal ChannelFaults.0…ChannelFaults.7
ChxBrokenWire
(Ch0…Ch7)
BOOL Decimal ChannelFaults.8…ChannelFaults.15
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.