Parker AC30 series - STO State Transition Diagram

Safe Torque Off 6-16
AC30V series Variable Speed Drive
STO State Transition Diagram
The flow chart below shows how the drive responds to STO inputs, start and stop commands.
Key:
* = One channel operation
** = Two channel operation
Transitional state. User
should avoid remaining
in this state
Fault state
Normal state
Out-of-box state
Normal startup state
X10/01 low
X10/03 low
Drive cannot run **
X10/01 low
X10/03 high
Drive cannot run *
X10/03 high
X10/01 high
X10/01 low
X10/03 low
X10/01 high
X10/03 low
Drive cannot run *
X10/01 high
X10/03 high
Drive enabled but not
running
X10/03 high
X10/03 low
X10/01 high
X10/01 low
X10/01 high
X10/03 high
Drive runs
X10/03 low
X10/01 low
START command
STOP command
Fault state
Drive cannot run.
ALL Power must be
cycled
2.3 seconds (typical)
2.3 seconds (typical)
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