Schedule Outputs Using MAOC

Time-scheduled output control can be used with the Motion Arm Output Cam (MAOC) instruction. The MAOC instruction enables position-based output control in these ways:

Uses the position of any motion axis in a Logix 5000 control system as the position reference.
Updates the outputs based on the motion axis position at the motion group coarse update rate, typically 1…32 ms.

The instruction can update standard digital output modules at the coarse update rate. However, some high-speed applications require a higher degree of accuracy.

The scheduled output modules improve the accuracy of the MAOC instruction by supporting the ability to schedule output On and Off times. All scheduling configuration for the On and Off times of an output is completed through the MAOC instruction. The instruction then updates values in the outputs of the module that define the scheduled output behavior.

The MAOC limits the minimum schedule interval (minimum pulse width) to 1/16 of the coarse update period.

For 5034-OB16 and 5034-OB8 modules, the scheduled output connection is compatible with MAOC. For 5034-UB8 and 5034-UB8F modules, you must set MAOC Compatible Data to Yes in the Device Definition dialog to work with MAOC.