We have an RMC150 with 3 axis “synchronized” and are occasionally experiencing and open loop mode while attempting to move. What would cause an open loop mode to occur in this Sync Move Absolute (13) command
What does the Event Log say?
Output Saturated and Group Halt
So that means that the Control Output is saturating (going to 10 votls), and the AutoStops are halting the axis. Since it is a synchronized move, all the axis halt when one halts.
If you look at the plots, that should give you more info as to why the Control Output is saturating. It could be that the axis hit an obstruction, or it could be that the axis is being commanded to move to fast, so that occasionally the output saturates.