Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual - Manual (Page 98)

Publication 1746-UM008B-EN-P - December 2006
98 Ladder Programming Examples
Programming to Invoke Autocalibration
] [
Condition for
Autocalibration
I:1
1
Rung 2:0 Channel 0 Enable
B3
0
[OSR] (U)
O:3.0
11
Channel 0 Flag
(L)
B3
1
]/[
Channel 0 Status
I:3.4
11
Rung 2:1 Channel 0 Enable
B3
1
] [ (L)
O:3.0
11
Channel 0 Flag
(U)
B3
1
Channel 0 Flag
IMPORTANT
The RTD module responds to processor commands much more
frequently than it updates its own LED indicators. Therefore, it
is normal to execute these two rungs and have the RTD module
perform an autocalibration of channel 0 without the channel 0
LED indicator ever changing state.