Sto State Transition Diagram - Parker AC30P Hardware Installation Manual

STO State Transition Diagram

The flow chart below shows how the drive responds to STO inputs, start and stop commands.
X10/01 high
X10/01 high
X10/03 low
Drive cannot run *
X10/01 low
2.3 seconds (typical)
X10/03 high
X10/03 low
STOP command
X10/03 low
Key:
* = One channel operation
** = Two channel operation
AC30 series Variable Speed Inverter
Out-of-box state
Normal startup state
X10/01 low X10/03 high
X10/03 low
Drive cannot run **
X10/03 low
Fault state
Drive cannot run.
2.3 seconds (typical)
ALL Power must
be cycled
X10/01 high
X10/01 high
X10/03 high
Drive enabled but
not running
X10/01 low
START command
X10/01 high
X10/03 high
Drive runs
X10/01 low
Safe Torque Off
X10/01 low
X10/03 high
Drive cannot run *
Normal state
Transitional state.
User should avoid
remaining in this
Fault state
8-15
state