Chapter 5—System Configuration and Operation98 Power Xpert C445 Global Motor Management Relay MN042003EN—October 2016 www.eaton.comControl SettingsThe following parameters are used to configure the autotransformer reduced voltage motor starter control profile andthe C445 sources of control.Table 20. Auto Transformer Configuration ParametersFieldbus Control WordThe auto transformer reduced voltage motor starter profilewill accept the following control commands over a fieldbusnetwork.Control BitsBit 0 0 = Stop command, de-activate all control outputs1 = Run1 command, begin start sequenceBit 3 0 = No action1= Reset fault (will clear fault provided conditionhas cleared)Bit 5 0 = No action1= The C445 will issue a “Test Trip” fault causingthe Outputs 1-3 control relays to openControl Status WordThe control status word of the auto transformer reducedvoltage motor starter profile can be accessed over thefieldbus network.Status BitsBit 0 0 = Stopped (No active Run1 command)1= Running1 (Run1 command is present)Bit 2 0 = local control source active1= remote control source is activeBit 3 0 = no fault present1= C445 fault presentBit 4 0 = no warning present1= C445 warning presentBit 5 0 = no inhibit present1= C445 control inhibit presentBit 6 0 = C445 not ready (fault and/or inhibit present)1= C445 ready for control (No fault or inhibit present)Bit 7 0 = motor is not up to speed (AtRef)1= C445 has detected motor is up to speed ondelta winding (AtRef)Two conditions will set the AtRef bit, signaling the motor isup to speed.● After transitioning to the full voltage output, if motorcurrent increases above 115% of the active overload FLArating and then decreases back below 115% of the activeoverload FLA rating, it is determined the motor has comeup to speed and the AtRef bit will be set.● After transitioning to the full voltage output, if motorcurrent exceeds 30% of the active overload FLA rating andremains until after the start delay time expires the motor isdetermined to be up to speed and the AtRef bit will be set.Configuration Parameter Modbus Register Description Read/Write*C445 Active Operation Mode 700 Parameter selects control profile;Set to “6” for auto transformer reduced voltage motor starterR/WControl Fault Delay 701 Delay time from change in command before a control fault is issued. Setting of “0”disables this protection.R/WNetwork Contactor Settle Time 704 Settle delay time before second contactor is activated – ensures the first contactoris sealed in before applying the line (in 10 ms)R/WMaximum Star Winding Time 705 Maximum time the control will stay on the reduced voltage output beforetransitioning to full voltage (in 100 ms)R/WMotor#1 Overload FLA Scaled 900 Parameter to set motor nameplate full load amp rating for overload and motorprotectionsR/WMotor#2 Overload FLA Scaled 901 Not used R/WMotor Overload Trip FLA 500 Parameter holds active motor overload FLA rating (will contain the motor1 setting) RTrip Enable Bit Field 1000-1001 Trip (Fault) protection enable bitsSet bits to enable desired motor protectionsR/WWarn Enable Bit Field 1002-1003 Warning protection enable bitsSet bits to enable desired motor protections warningsR/W*C445 Local Source Selector 711 See Section – C445 Local/Remote Control Source Selection R/WC445 Remote Source Selector 712 See Section – C445 Local/Remote Control Source Selection R/W
