Allen-Bradley 1756 ControlLogix - Page 522

Chapter 7
MDSC Functionality
522 Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018
Function Block
This instruction is not available in function block.
Structured Text
MDAC (SlaveAxis, MasterAxis, MotionControl, MotionType,
MasterReference);
Operands
Ladder Diagram
Operand Type
CompactLogix 5380,
CompactLogix 5480,
ControlLogix 5580, Compact
GuardLogix 5380, and
GuardLogix 5580 controllers
Type
CompactLogix 5370,
ControlLogix 5570, Compact
GuardLogix 5370, and
GuardLogix 5570 controllers
Format Description
Slave Axis AXIS_CIP_DRIVE
AXIS_VIRTUAL
AXIS_SERVO
AXIS_SERVO_DRIVE
AXIS_GENERIC
AXIS_GENERIC_DRIVE
AXIS_CIP_DRIVE
AXIS_VIRTUAL
Tag The Single Axis being
controlled by the Master Axis
when the motion planner is in
Master Driven mode. Ellipsis
launches Axis properties
dialog.
The MDAC link is broken when
the following instructions are
executed:
On the Slave Axis: MAS (All),
MCS (All), MGS, MASD, MCSD,
MGSD, a mode change. Note
that MAS (anything other
than All) and MCS
(coordinated) do NOT break
the MDAC link.
The Shutdown instructions
(MGSD, MASD, MCSD) never
go IP.
On the Master Axis: MASD,
MCSD, and MGSD. Note that
MAS and MCS for any Stop
Type, including All, do NOT
break the MDAC link.
A mode change (Rem Run to
Rem Prog or Rem Prog to Rem
Run) or an axis fault also
breaks the MDAC link.