3.12 External InterlockSystems that may be affected during drive fault conditions should be interlocked with the drive fault output and ready signal.u Drive ReadyWhen the “Drive ready” signal has been set to one of the multi-function contact outputs, that output will close whenever thedrive is ready to accept a Run command or is already running.The “Drive ready” signal switches off when operation is not possible for a Run command input under the following conditionsregardless of whether a fault exists:• when the power supply is shut off• during a fault• when there is problem with the control power supply• when a parameter setting error makes the drive unable to run even if a Run command has been entered• when a fault such as overvoltage or undervoltage is triggered as soon as the Run command is entered• when the drive is in the Programming mode and will not accept a Run command even when enteredn Interlock Circuit ExampleTwo drives running a single application might interlock with the controller using the Drive Ready and Fault output signals asshown below. Figure 3.28 illustrates how the application would not be able to run if either drive experiences a fault or isunable to supply a Drive Ready signal.Terminal Output Signal Parameter SettingMA, MB, MC Fault –M1-M2 Drive Ready H2-01 = 06OperationCircuitDrive ReadyDrive Ready StopReady1 Ready2 Fault1RunFault2RUN S1SCMBMAM2M1MCFault 1Ready 1SASAMax250 VacRelay 1Relay 2Relay 1Relay 2ControllerFaultOutputDrive ReadyDrive 1RUN S1SCMBMAM2M1MCFault 2Ready 2SASAMax250 VacRelay 1Relay 2Relay 1Relay 2ControllerFaultOutputDrive ReadyDrive 2Figure 3.28 Interlock Circuit Example3.12 External Interlock96 YASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual
