1756-Irt8I Module Tags; Configuration Tags - Allen-Bradley 1756-IF8I User Manual

Table 30 - 1756-IF8I Module - Output Tags (continued)
Tag Name
Ch[x].CalLowReference
Ch[x].CalHighReference
Ch[x].SensorOffset

1756-IRT8I Module Tags

Table 31 - 1756-IRT8I Module - Configuration Tags
Tag Name
RemoteTermination
CJDisable
CJOffset
Ch[x].InputRange
Data Type Definition
BOOL Rising edge triggers the Low Calibration at the Low
Reference Point for the current C.Ch[x].InputRange tag
value.
A valid Low Reference signal must be connected to the
channel before setting this tag.
BOOL Rising edge triggers a High Calibration at the High
Reference Point for the current C.Ch[x]nputRange tag
value.
A valid High Reference signal must be connected to the
channel before setting tag.
REAL Compensates for any known error on the sensor or
channel to which the sensor is connected.
This section describes the tags associated with the 1756-IRT8I module.
Each application's series of tags varies but no input module application
IMPORTANT
contains any tags that are not listed here.

Configuration Tags

The following table describes the Configuration tags associated with the
1756-IRT8I module.
Data Type Definition
BOOL Indicates CJC Sensor is connected remotely or locally.
• If the CJC sensor if connected remotely, we
recommend that you use an isothermal bar.
With an isothermal bar, the CJC sensor is the same for
all eight channels.
1492 IFMs use a built-in isothermal bar.
• If the CJC sensor is connected locally, thermal
gradients exist on the RTB because heat rises.
With an RTB, temperature differences exist between
the CJC sensors. Correction factors are applied
internally to account for the differences.
BOOL Removes cold junction compensation from Thermocouple
calculations.
By default module configuration, cold junction is
compensated for each Thermocouple channel returning
temperature.
REAL User-defined offset value, measure in temperature units,
to add to the channel's CJC sensor reading.
SINT Channel's operating range.
Rockwell Automation Publication 1756-UM540E-EN-P - December 2017
Analog I/O Module Tag Definitions
Valid Values
• 0 = Do not sample the Low
Reference Calibration Point.
• 1 = Sample the Low Reference
Calibration point on rising edge.
• 0 = Do not sample the High
Reference Calibration Point.
• 1 = Sample the High Reference
Calibration point on rising edge.
Any
(We recommend that you use a
small value in the channel's
operating range.)
0.0 = default
Valid Values
• 0 = CJC sensor is
connected locally via the RTB
• 1 = CJC sensor is connected
remotely (default)
• 0 = CJ compensation enabled
• 1 = No CJ compensation
Default = 0.0 C
• 4 = -100...100 mV
• 6 = 0...500 Ω
• 7 = 0...1000 Ω
• 8 = 0...2000 Ω
• 9 = 0...4000 Ω
Appendix A
189