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The add-on "Hmi Utililties" (NxHmiUtilAddon) shows you the user rights of the HMI. Keep in mind that on every HMI a different user can be logged in! That means you need one add-on for each HMI. If you want to block buttons or switches in the HMI, you should not use a Boolean PLC variable, but use the authorization property of the HMI Smart Control properties: Using this property shows the operator why the button cannot be pressed: Manual functions or operation modes can directly be configured in CpStudio / OES:     Online view of Hmi Util add-on with an admin user (EditData104): or binary ... View more

Axis.ParImm.Enable := Axis.OutImm.DriveReadyForOp AND BinIo._000K985 (safety signal that activates emergency stop or STO in the drive). ... View more

You are right, your code example in the previous answers works because _signal1Ok and _signal2Ok are remembering the state if WaitIo has already returned OK one time. But you must be careful to reset these variables in all cases, for example in the previous step. ... View more