800xA Engineering Studio Function Designer vs. Control Builder M Programs usage
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One of the biggest advantage of function designer is, it support Bulk Data Manager (BDM). BDM can be used for creating multiple diagrams in single shot (using a typical diagram), rename diagram variables and same template can be used to generate code in CBM as well. BDM saves lots of engineering time compare to CBM. Other advantages like signal range, unit.. etc. can be modified/configured in bulk using BDM.