Parker HannifinMotion Enable Input OpenBit 5646 (Unlatched Motion Enable Input) is used to indicate when the MotionEnable input circuit is open. See Figure 32.Figure 32 Motion Enable Input FaultIf the Motion Enable input circuit is closed and Bit 5646 still shows active, itindicates that the ACR90x0 may have been damaged by a large reversecurrent through the Motion Enable input connector. A large reverse currentcan be caused by using the Motion Enable’s 24 V supply to also powerinductive loads—such as brakes, solenoids, contactors, and relays—withoutloop-back protection diodes.If you suspect your ACR90x0 has been damaged, see “TechnicalAssistance” on page 3 for information on how to contact the automationtechnology center.See the section “Enable Connection” on page 71 for information on MotionEnable input connections.Axis I/O TroubleshootingSeveral controller parameters may need additional configuration to work withdifferent types of drives.If motion does not occur:• Enable input is not connected; see “Enable Connection” on page 71and “Enable Connector” on pages 52 and 54.• The load is jammed; remove power and clear jam.• Use the information in the section “Axis Status LED” on page 98 todetermine LED states and methods of resolution.• See “General Drive I/O” below for drive-function specifics.Chapter 4 Troubleshooting 105www.comoso.com
