CommunicationPage 7-10 ABB Control - AC 311SBC 260400 R1001-b 06.991.4. Reply times for MODBUS communicationThe MODBUS processing time depends on:- The transmission speed- The number of frame bytes- The central unit cycle time- The central unit load factorThe following times are for indication purposes only. Reply times with a 40 or 50 series central unitCycle time = 10 msLoad factor = 80%Speed = 9 600 BaudsNr. of variables Bits Wordsread (ms) write (ms) read (ms) write (ms)1 10 - 60 50 10 - 60 6010 10 - 60 60 10 - 60 11050 10 - 60 110 110 - 170 220100 50 - 60 110 220 -280 390150 50 - 110 - -255 50 - 110 - -
