Rockwell Automation 1746-NT4 Series B,D17466.6.1 SLC 500 4-Channel Thermocouple/mV Input Module User Manual - Manual (Page 50)

Publication 1746-UM007C-EN-P - July 2004
4-8 Preliminary Operating Considerations
Update Time Calculation Example
The following example shows how to calculate the module update
time for the given configuration:
•
channel 0 configured for 250 Hz filter frequency, enabled
•
channel 1 configured for 250 Hz filter frequency, enabled
•
channel 2 configured for 50 Hz filter frequency, enabled
•
channel 3 disabled
Using the values from the table above, add the the sum of all enabled
channel sample times, plus one CJC update time.
•
channel 0 sampling time = 12 ms
•
channel 1 sampling time = 12 ms
•
channel 2 sampling time = 60 ms
•
CJC update time = 14 ms
Module update time = 12 + 12 + 60 + 14 = 98 ms