Sto State Transition Diagram; State Transitions - Parker AC30P User's Product Manual

6-16
Safe Torque Off

STO State Transition Diagram

The flow chart below shows how the drive responds to STO inputs, start and stop commands.
X10/01 high
X10/03 low
Drive cannot run *
Key:
* = One channel operation
** = Two channel operation
Out-of-box state
Normal startup state
X10/01 high
X10/01 low
X10/03 low
Drive cannot run **
X10/01 low
Fault state
2.3 seconds (typical) Drive cannot run.
ALL Power must
be cycled
X10/01 high
X10/03 high
X10/03 high
Drive enabled but
not running
X10/03 low
STOP command
X10/01 high
X10/03 high
X10/03 low
Drive runs
X10/03 high
X10/01 low
X10/03 high
X10/03 low
Drive cannot run *
2.3 seconds (typical)
X10/01 high
X10/01 low
START command
X10/01 low
Normal state
Transitional state.
User should avoid
remaining in this
state
Fault state
AC30 series Variable Speed Inverter