Rockwell Automation 1746-NT4 Series B,D17466.6.1 SLC 500 4-Channel Thermocouple/mV Input Module User Manual - Manual (Page 68)

Publication 1746-UM007C-EN-P - July 2004
5-16 Channel Configuration, Data, and Status
Temperature Units Type Status (Bit 8)
The temperature units field indicates the state of the temperature units
bit in the configuration word (bit 8).
Channel Filter Frequency (Bits 9 and 10)
The channel filter frequency bit field reflects the filter frequency you
selected in the configuration word.
Channel Status (Bit 11)
The channel status bit indicates the operational state of the channel.
When the channel enable bit is set in the configuration word (bit 11),
the thermocouple module configures the selected channel and takes a
data sample for the channel data word before setting this bit in the
status word.
Open-Circuit Error (Bit 12)
This bit is set (1) whenever a configured channel detects an open–
circuit condition at its input. An open circuit at the CJC sensor will
also flag this error if the channel input type is either thermocouple or
CJC temperature.
Under-Range Error (Bit 13)
This bit is set (1) whenever a configured channel detects an under–
range condition for the channel data. An under-range condition exists
when the input value is below the specified lower limit of the
particular sensor connected to that channel. An under-range
temperature at the CJC sensor will also flag this error if the channel
input type is either thermocouple or CJC temperature.