Rockwell Automation Publication 750-PM001N-EN-P - February 2017 473
Application Notes Appendix C
You must calculate the [Remaining Life] parameter values for the cabinet fans in
each power structure. This calculation is required anytime the [Elapsed Life]
parameter of one power structure differs from another. This difference can occur
when one power structure has been replaced or serviced separately from the
others.
Example Code
This example code calculates the [Remaining Life] value of the cabinet fan for
the first power structure. For frames 9 and 10, use similar logic for the other
cabinet fans. Use similar logic to calculate the [Remaining Life] of the heatsink
fans and the internal stirring fans.
1. Use a timer instruction to set a sensible time interval for reading the data.
See Figure 82
.
Figure 82 - Timer Instruction
2. Use a message instruction to retrieve the Total Life value. See Figure 83.
Figure 83 - MSG Instruction
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