How to compute the machine and operator stop & fault times in DFWorks

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Machine Stop Time

 
Machine Stop Time begins to accrue when the inserter stops due to system errors. This is called fault state. Examples of system errors are: jams, running out of material at the input or the chassis feeders, file & serial i/o errors, etc). These errors are called machine-initiated stops.
 
Machine Stop Time stops accruing when ONE of the following occurs:
 
a)Operator takes the machine out of the fault state by clearing the alarm(s) displayed on the DC screen. (This of course is either preceded or followed by removing the paper that caused the jam, or loading more material for a feeder etc depending on the type of error).
b)Maximum time that can be charged to Machine Stop Time is reached. That is, the DC software brings the machine out of the fault state after a certain time period. This time limit (called ‘Max Error Time’) is configurable within DC and has a default value of 30 seconds.
 

Machine Fault Time

 
Machine Fault Time starts accruing for the same reasons as the Machine Stop Time. That is, the amount of time the machine spends in the fault state is accrued against the Machine Fault Time.
 
Additionally, if DC is configured to log user initiated stop time to Machine Fault Time, then the amount of time the machine spends in the stopped state (state in which no mail is processed) is also logged to the Machine Fault Time.
 
Machine Fault and Machine Stop Times will be equal if DC is NOT configured to log user initiated stop time to Machine Fault Time. This is the normal case because DC is NOT configured to log user initiated stop time to Machine Fault Time unless requested by the customer.
 
If DC is configured to log user initiated stop time to Machine Fault Time then the Machine Fault Time will be the sum of the time spent in the fault state and ONE of the following:
 
a) Time spent in the stopped state.
b) Maximum user initiated stop time chargeable to the Machine Fault Time. This time limit (called ‘User Stop Rollover Period’) is configurable within DC and has a default value of 30 seconds. This is different from the ‘Max Error Time’ mentioned in the definition for Machine Stop Time.
 
 

User Stop Time

 
User Stop Time is the sum of the time spent in the stopped state and the time in excess of the allowed machine delay rollover period.
 
Machine delay rollover period is configurable and has a default value of 5 seconds. If the machine remains in the delay state for say 10 seconds, then 5 seconds is charged to the machine delay time and the remaining 5 seconds is charged to the user stop time and user fault time.
 

User Fault Time

 
User Fault Time is the sum of the time in excess of the machine delay rollover period and
 
a) all the time spent in the stopped state provided DC is not configured to log user initiated stop time to machine fault time
OR
b) if DC is configured to log user initiated stop time to machine fault time, then any time in excess of the user stop rollover period (this configurable time limit has a default value of 30 seconds).

UPDATED: April 14, 2017

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