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PL12EN-1300 2008-03
en03d141.fm, 11.03.2008
Programming
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3.11.10
Arcnet / Statistic
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Fig. 3-50: Arcnet / Statistic
arcstat.txtS
The ARCNET statistics allow to check the stability of the field bus system. There are two different
statistics:
arcstat.txtE
• For all external hardware components (bridges, TMs)
• For the station controller
The following is a description of the parameters required for stable operation.
TM Bridge
Description
Reconfigurations
Change upon each reset of a participant
Own reconfigurations
Change upon each reset or severe failure
Excessive NAK
Should be stable
New next ID
Change upon switch-off/on of downstream participant
CRC error
Should be stable
Lost Token
Should be stable
Send repetitions
Should be stable
Send termination
Should be stable
Receive terminations
Should be stable
Command errors
Should be stable
Unassignable ACKs
Should be stable
ACKs with Bit 14/15-Packets without CPT protocol
Should be stable
Input queue overflow
Should be stable
Packet not assigned by node
Should be stable
Discarded input packets
Should be stable