Rockwell Automation Publication ICSTT-RM448J-EN-P - April 2018
111
Install the AADvance System
Chapter 5
Field Loop Circuit for 4-Wire Analogue Input
Figure 19 - Wire Analogue Input Field Loop
Analogue Input Slew Tolerance
It is possible during sustained periods of abnormal input current slewing that
channels can be declared faulted as a consequence of diagnostics otherwise
designed to ensure the channels are operating within their designed safety
accuracy.
To avoid spurious declaration of channel faults it is necessary to ensure that the
input signal condition satisfies the maximum slew rate criteria defined in the
Solutions Handbook. Accordingly it may be necessary to condition the input
signal such as by filtering, sensor slew rate configuration or by appropriate
choice of process safety time.
