Motion State Instructions 
 
  Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018  71 
This information applies to the CompactLogix 5370, ControlLogix 5570, 
Compact GuardLogix 5370, GuardLogix 5570, Compact GuardLogix 5380, 
CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, and GuardLogix 
5580 controllers. Controller differences are noted where applicable. 
Use the Motion Servo Off (MSF) instruction to deactivate the drive output for 
the specified axis and to deactivate the axis' servo loop. 
Important:  If you execute an MSF instruction while the axis is moving, the axis coasts to an uncontrolled stop. 
Available Languages 
Ladder Diagram 
 
Function Block 
This instruction is not available in function block. 
Structured Text 
MSF (Axis,MotionControl); 
Operands 
Ladder Diagram and Structured Text 
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 
Axis  AXIS_CIP_DRIVE  AXIS_CIP_DRIVE 
AXIS_GENERIC 
AXIS_GENERIC_DRIVE 
AXIS_SERVO 
AXIS_SERVO_DRIVE 
Tag  Name of the axis to 
perform operation on 
Motion Control  MOTION_INSTRUCTION  MOTION_INSTRUCTION  Tag  Structure used to access 
instruction status 
parameters. 
See Structured Text Syntax for more information on the syntax of expressions 
within structured text.