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PROCESS CONTROL ---- FACTORY AUTOMATION ---- EXPLOSION PROTECTION ---- MACHINE
Excom Remote I/O
& Profibus Limits/Cycle Times
Transmission Rates/Cycle Times
The PROFIBUS-DP master determines the system-specific transmission
rate. Admissible baud rates range from 9.6 to 1500 kBaud.
The internal cycle time for processing of 128 binary signals is below 5 ms and
for 64 analogue signals below 20 ms. These cycle times
are very fast. The response time of the entire system thus largely depends on
the number of PROFIBUS-DP nodes and the processing
time of the higher level system.
The general formula is: TR = 2 x TI + 2 x TB + 2 x TPLS
TR = response time; TI = internal cycle time Ex link; TB = cycle time of higher
level bus TPLS = cycle time of the process control system.