24 • 750-636 [DC Drive Controller]Function DescriptionWAGO-I/O-SYSTEM 750I/O-Modules2.1.1.9 Function Description2.1.1.9.1 Operating Modes and Drive FunctionsThe operating modes of the DC Drive Controller permit positive and negativemovement with position feedback and automatically approach a setpointposition.When positioning automatically, the positioning accuracy can be optimizedvia optional parameters (Prestop, Retry, etc.).Other parameters for target window size, stop interval for reversion of rotatingdirection or compensation of gearbox clearance adapt the system to themechanics.2.1.1.9.2 Preset FunctionsTwo different preset functions can be used to reference the drive.The value can be specified via parameter; after enabling the preset input, thisvalue is assigned to its position when approaching the reference cam.Afterward, the drive is stopped.A second option is using the control to assign the setpoint value to the actualposition.Notification of preset function execution is returned via terminal status; the bit'Reference_OK' goes to logic 1. During running operation, this bit is reset tologic 0 by one of the following events:• restart a preset motion• failure of field-sided 24 V• overflow or underflow of the actual position counter.
