Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module User Manual - Manual (Page 51)

Publication 1746-UM022B-EN-P - January 2005
Channel Configuration, Data, and Status 4-11
Guidelines for filter frequency are listed below.
•
250 Hz setting provides minimal noise filtering.
•
60 Hz setting provides 60 Hz AC line noise filtering.
•
50 Hz setting provides 50 Hz AC line noise filtering.
•
10 Hz setting provides both 50 Hz and 60 Hz AC line noise
filtering.
When a CJC input type is selected, filter frequency is ignored. To
maximize the speed versus resolution trade-off, CJC inputs are
sampled at 60 Hz.
Unused Bits (Bits 12 through 14)
Bits 12-14 are not defined. Ensure these bits are always cleared (0).
Select Input Image Type (Bit 15)
The input image type bit allows you to select data or status
information in the channel’s input image word. When set (1), the
module places channel data in the corresponding input image word.
When the bit is cleared (0) the module places channel status in the
corresponding input image word.
Channel Data/Status Word The actual thermocouple or millivolt input data values or channel
status reside in I:e.0 through I:e.7 of the thermocouple module input
image file. The data values present depend on the input type and data
formats you have selected. When an input channel is disabled, its data
word is reset (0).
Module Input Image (Data/Status) Word
Channel 0 Channel Data/Status Word
Channel 1 Channel Data/Status Word
Channel 2 Channel Data/Status Word
Channel 3 Channel Data/Status Word
Channel 4 Channel Data/Status Word
Channel 5 Channel Data/Status Word
Channel 6 Channel Data/Status Word
Channel 7 Channel Data/Status Word
0 15
I:e.0
I:e.1
I:e.2
I:e.3
I:e.4
I:e.5
I:e.6
I:e.7