How many power flex drives on ethernet?
- Thread starter scalelar
- Start date
Ken Roach
Lifetime Supporting Member + Moderator
EtherNet/IP capacity is fairly straightforward to calculate, but RA makes a pretty good 'EtherNet/IP Capacity Tool' that you can plug in various I/O devices and different CPUs and get an estimate of how hard the controller and Ethernet interface will be working.
http://www.rockwellautomation.com/solutions/integratedarchitecture/resources3.html
One important thing about using PowerFlex 40 series drives is not to waste bandwidth going too fast; the DSI interface is much slower than the DPI interface used on the 7-series. A PowerFlex 40 drive takes about 70 milliseconds to accept a command and deliver a status reply, so my default RPI is 35 milliseconds for those drives.
http://www.rockwellautomation.com/solutions/integratedarchitecture/resources3.html
One important thing about using PowerFlex 40 series drives is not to waste bandwidth going too fast; the DSI interface is much slower than the DPI interface used on the 7-series. A PowerFlex 40 drive takes about 70 milliseconds to accept a command and deliver a status reply, so my default RPI is 35 milliseconds for those drives.
Mickey
Lifetime Supporting Member
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