Parker AC30 - STO State Transition Diagram

6-16 Safe Torque Off
AC30 series Variable Speed Inverter
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)