ComBricks User Manual v6.4.0 | January 18| © PROCENTEC 73/219
5.9 Summary of Statistics and Events
This paragraph contains a description of the items listed in the statistics and/or events.
How many times a device in data exchange fails to respond after
the maximum retries have been reached. Lost is retriggered
when the device recovers back to data exchange and fails to
respond again.
• Live List will indicate a yellow colored address (after time-
out).
• When the device was already lost after the activation of
ProfiTrace Lost will not be updated. Only Syncs will indicate
the problem.
Attempts of the master to contact a device for the first time or
establish a communication relationship. This occurs in most cases
after station lost, device unavailability or startup of the master. In
the statistics view this values adds up relatively quick.
• Some DCS systems read diagnostics all the time with Syncs
ON.
• - Live List could indicate a yellow colored address.
Attempt of the master to get a response from an unanswered
telegram. The response did not come or has content errors. The
maximum amount of repeats a master attempts can be
customized in the master.
• When the retries have reached the limit, the master goes to
the Syncs state
Repeats Max
(worst sequence)
This value represents the highest amount of retries that were
attempted on this specific device in one cycle.
• This value will never get higher than the retry value that has
been setup in the master.
The response to a master request telegram contains framing
errors (parity error, wrong FCS, SD error, etc). This mostly
happens with EMC and cabling problems.
• When this statistic adds up relatively quick, it could also be a
double device address.
Negative responses at the lowest telegram level (Layer 2: FDL)
and are rare. In the telegram recording you will see SD1
telegrams with for example an RS (Reject Service) or RR (Reject
Resources).
Examples of situations where this occurs:
• DP-V1 connections to DP-V0 devices.
• Watchdog has run out on a DP device and the master sends a
Data Exchange output telegram.
• Non-certified DP devices that do not support a specific
service/command or cannot handle a command in time.
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