How many lost packages are acceptable - AC800M Control Network
Anyone know How many lost packages per second (in average) are considered acceptable for a control Network with AC800M (PM866, PM864) ?
Thanks in advance.
Voted best answer
I recommend pulling the CBM->Remote System ->Controller Diagnosis->Network Information (get) for a more detailed analysis.
High load and too less Task Offset may cause trouble for the lesser prioritized communication tasks. Stay below 90% total load, preferably less (the cyclic load is restricted to 70%, stay well below to avoid ”auto breaks”). Distribute free time by assigning Task Offset between tasks. Scan module bus as slow as possible.
Check communication statistics in the switch. Some losses (up to ~5%) is considered OK on half duplex due to the nature of collisions.
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