Atlas Copco PowerMACS 4000, User Manual

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Tightening
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6.5.5.4 Advanced RM Actions
The RM actions specified above do not take into consideration any ”history” of the cycle. Decisions are
made for each sequence separately, without looking back on what has happened earlier in the cycle.
With the Advanced RM you can have an alternative RM dependent on what has happened earlier, in
terms of number of sequences, spindles, and groups that have failed.
The conditions for when to start Advanced RM are set up for a Station using the System Map, see chapter
Station Set Up.
You may choose one or more of the following alternatives (with step is here meant all steps between two
synchronization points):

When more than No. of reject steps in cycle erroneous steps have been detected during the
cycle. The function counts the number of times steps fail (regardless of which bolt(s) that failed and
which step number that failed) while the station is running in state "Normal". That is, whenever the
First failure alternative is at hand.

When more than No. of reject groups in step erroneous groups have been detected in the
current synchronization interval. This function counts the number of groups that includes one or
more failing bolts. The check is done after each synchronization point and involves only the bolts
that executed the step(s). This means that bolts that where ordered to "Wait", "Continue" or
"Terminate" in a previous step (or synchronization point) are not counted.

When more than No. of reject bolts in step erroneous bolts have been detected in the current
synchronization interval. This function counts the number of bolts that failed. The check is done
after each synchronization point and involves only the bolts that executed the step(s). This means
that bolts that where ordered to "Wait", "Continue" or "Terminate" in a previous step (or
synchronization point) are not counted.
The Advanced RM will be used if any of the selected conditions has been met. The conditions are
common to all steps in the cycle, independent of which is the current step.