Chapter 8. Gigabit Ethernet (GbE) Interface Overview and Operation162 PACSystems* RXi Distributed IO Controller User Manual GFK-2816FError Status(Hexadecimal) Error DescriptionAA90H An attempt to establish a TCP connection with a Remote Server has failed. Check the following:▪ Make sure the Server is turned on.▪ Make sure cables are connected.▪ If using a switch, make sure the switch is turned on.AB90H A COMMREQ was discarded because the application program issued the COMMREQ before the COMMREQStatus Word for the previous COMMREQ was set.AC90H A protocol error occurred while communicating with the local controller.AD90H A TCP Timeout occurred while communicating with the Remote Controller.AE90H A protocol error occurred while communicating with the local Controller.B490H The channel that the application is trying to open is already open.B590H The channel the application is trying to access is owned by a different protocol.B690H COMMREQ specified an invalid Modbus function code.B790H COMMREQ specified an invalid Modbus unit ID.B890H COMMREQ specified an invalid number of subrequests.B990H A COMMREQ subrequest specified an invalid record number.C090H Reserved.FF90H Abort in progress on a channel