Engineer1
Member
Hi All,
Please assist, we have a number of powerflex 400 drives, which intermittently have Comm Loss (F81) error, this occurs at random and the manual is not so useful as the adapter is not disconnected not is the wiring loose, and the timeout of 5sec sounds sufficient.
anyone have any idea what the issue might be? Allen Bradley have not replied. And the site is considering pulling the plug on Profibus and hard wiring all signals as they beleive that this issue is related to Profibus.
I do not beleive this to be the case, and right now am not a fan of Allen Bradley, sometimes the adapter flashes red on MOD, which also indicates Comm Loss on the adapter side, but these two faults do not occur at the same time, hence sometimes the Comm Loss is on the drive side and sometimes its on the adapter side.
changing adapters has not had an effect.
we are currently changing the connection belts, and the manual states... "replace port expander", i have no idea what that is!
please, someone assist.
Please assist, we have a number of powerflex 400 drives, which intermittently have Comm Loss (F81) error, this occurs at random and the manual is not so useful as the adapter is not disconnected not is the wiring loose, and the timeout of 5sec sounds sufficient.
anyone have any idea what the issue might be? Allen Bradley have not replied. And the site is considering pulling the plug on Profibus and hard wiring all signals as they beleive that this issue is related to Profibus.
I do not beleive this to be the case, and right now am not a fan of Allen Bradley, sometimes the adapter flashes red on MOD, which also indicates Comm Loss on the adapter side, but these two faults do not occur at the same time, hence sometimes the Comm Loss is on the drive side and sometimes its on the adapter side.
changing adapters has not had an effect.
we are currently changing the connection belts, and the manual states... "replace port expander", i have no idea what that is!
please, someone assist.