Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018 533
The MDAC link is broken on the Master Axis when the following instructions
are executed on the Master Axis:
• MASD, MCSD, and MGSD. The MAS and MCS instructions for any
• Stop Type, including All, do not break the MDAC link.
• A mode change or an axis fault also breaks the MDAC link.
Before any of the MDSC parameters, identified in table below, are used by the
instructions MAM, MAJ or MATC, you must execute an MDAC instruction
containing the axis as a slave and it must be active. This table identifies which
parameter is applicable to the following single axis motion instructions, that is, to
MAM, MAJ or MATC and the mode it is applicable in.
MDSC (Master Driven Speed Control) Parameter Structure
Parameter Instruction Mode
Input Parameters
Lock Direction MAM, MAJ, MATC Master Driven Only
Lock Position MAM, MAJ, MATC Master Driven Only
Event Distance MAM All modes (Master Driven or Time Driven)
Instruction Mode MATC Identifies the mode of the instruction to be either
Time
Driven (0) or Master Driven mode (1)
Output Parameter
Calculated Data MAM All modes (Master Driven, Time Driven, and Timed
Parameters Structure for
Single Axis Motion
Instructions
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