PIPROFIBUS
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Does the cycle time depend on the choice of addresses?
Does the cycle time depend on the choice of addresses?
PIPROFIBUS
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No, the cycle time is independent, since the master always has a cyclic communication with the slaves.
PROFIBUS and PROFINET have one of the fastest cycle times, often under 1 ms which is extremely stable making the communication Real-Time.
The address choice does NOT influence the cycle times because the master is cyclically communicating with all the slaves.
A PA coupler needs around 14.5 ms per slave so the cycle time can be calculated by the following formula:
N * (0.256 * Ibytes + 14.5) + 40 ms
Where N represents the number of PA instruments and Ibytes shows the number of bytes per each of the instruments.
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