Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 191
Analog I/O Module Tag Definitions Appendix A
Ch[x]. TempEnglish BOOL Used with the TempAbsolute tag for the same channel to
determine the temperature units for the channel when
linearizing (non-zero sensor type).
• 0 = Standard (default)
• 1 = English
IMPORTANT: The combination of
this value with that of the
TempAbsolute tag value determine
the temperature unit used.
For example, if TempEnglish = 0
and TempAbsolute = 0, the
combination is 00.
Thus, Celsius units are used.
The following combinations are
possible:
• 00 = Celsius
• 01 = Fahrenheit
• 10 = Kelvin
• 11 = Rankine
Ch[x].TempAbsolute BOOL Used with the TempEnglish tag for the same channel to
determine the temperature units for the channel when
linearizing (non-zero sensor type).
• 0 = Familiar (default)
• 1 = Absolute
IMPORTANT: See the TempEnglish
tag Valid Values description for
more information on using this tag’s
value.
Ch[x].FourWireRTD BOOL Sets what type of RTD, that is, 3-wire or 4-wire, is
connected to the channel.
• 0 = 3-wire RTD (default)
• 1 = 4-wire RTD
Ch[x].SynchronizeSampling BOOL Determines if the sampling of the channel is synchronized
with other channels configured for synchronized
sampling.
• 0 = Not synchronized (default)
• 1 = Synchronized
Ch[x].TenOhmOffset INT Specific offset for 10 Ohm Copper Sensor Type.
Value is measured in Hundredths of Ω with two implied
decimal places.
-100…100 in hundredths of Ω
0 = default
Ch[x].DigitalFilter INT Time Constant for a First Order Lag filter. 0…32,767 ms
0 = default
Ch[x].RateAlarmLimit REAL Rate of change in Engineering Units/Second
If the absolute value of the change between samples
divided by the sample time exceeds this value, the
I.Ch[x].RateAlarm tag is sets.
Any positive value
0.0 = default (This value represents
no change between samples.)
Ch[x].LowSignal REAL Signal scaling value that lets you scale signal units (mV, Ω,
°F or °C) into Engineering Units.
Corresponds to the C.Ch[x].LowEngineering tag. That is,
this tag’s value is scaled to the lowest Engineering Unit.
Any value that is less than the
C.Ch[x].HighSignal tag value.
0 = default
Ch[x].HighSignal REAL Signal scaling value that lets you scale signal units (mV, Ω,
°F or °C) into Engineering Units.
Corresponds to the C.Ch[x].HighEngineering tag. That is,
this tag’s value is scaled to the highest Engineering Unit.
Any value that is greater than the
C.Ch[x].LowSignal tag value.
100.0 = default
Ch[x].LowEngineering REAL Low engineering scaling point
Corresponds to the C.Ch[x].LowSignal tag value.
0.0 = default
This value can correspond to signal
values in units or temperature.
Ch[x].HighEngineering REAL High engineering scaling point
Corresponds to the C.Ch[x].HighSignal tag value.
1
00.0
= default
This value can correspond to signal
values in units or temperature.
Ch[x].LLAlarmLimit REAL Low Low Process Alarm limit
Triggers the I.Ch[x].LLAlarm tag when the I.Ch[x].Data tag
value is less than this tag’s value.
0.0 = default
Table 31 - 1756-IRT8I Module - Configuration Tags (continued)
Tag Name Data Type Definition Valid Values
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