Siemens SIMATIC S7-1500 Function Manual page 226

Diagnostics
10.6 Positioning axis/synchronous axis technology object
Status limit switch
The following table shows the possibilities for enabling the software and hardware limit
switches:
Limit switch
Negative software limit
switch approached
Positive software limit switch
approached
Negative hardware limit
switch approached
Positive hardware limit
switch approached
Motion status
The following table shows the possible axis motion status values:
Status
Done (no active job)
Homing job
Jog
Velocity setpoint
Positioning job
Constant velocity
Standstill
Accelerating
Decelerating
226
Description
The negative software limit switch was approached.
(<TO>.StatusWord.X15 (SWLimitMinActive))
The positive software limit switch was approached.
(<TO>.StatusWord.X16 (SWLimitMaxActive))
The negative hardware limit switch was approached.
(<TO>.StatusWord.X17 (HWLimitMinActive))
The positive hardware limit switch was approached or passed.
(<TO>.StatusWord.X18 (HWLimitMaxActive))
Description
No motion job is active at the technology object.
(<TO>.StatusWord.X6 (Done))
The technology object is executing a homing job from the Motion Control instruction
"MC_Home", or from the axis control panel.
(<TO>.StatusWord.X11 (HomingCommand))
The axis is being moved by a jog mode job from the Motion Control instruction
"MC_MoveJog", or from the axis control panel.
(<TO>.StatusWord.X9 (JogCommand))
A job traverses the axis at the speed setpoint specified in Motion Control instruction
"MC_MoveVelocity" or at the axis control panel.
(<TO>.StatusWord.X10 (VelocityCommand))
The axis is being moved by a positioning job from the Motion Control instructions
"MC_MoveAbsolute", "MC_MoveRelative", or from the axis control panel.
(<TO>.StatusWord.X8 (PositioningCommand))
The axis is traversing at a constant velocity or is at a standstill.
(<TO>.StatusWord.X12 (ConstantVelocity))
The axis is at a standstill.
(<TO>.StatusWord.X7 (StandStill))
The axis is being accelerated.
(<TO>.StatusWord.X13 (Accelerating))
The axis is being decelerated.
(<TO>.StatusWord.X14 (Decelerating))
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC