Truth Table - Parker AC30P Hardware Installation Manual

8-10
Safe Torque Off

Truth Table

Overview
STO Active
Abnormal
one-channel
operation
detection
STO Inactive
Drive
unpowered
STO Input A STO Input B
X10/01 X10/03
Drive cannot start or supply power to its motor. STO trip
reported.
0V 0V
This is the intended safe state of the product with correct
dual-channel operation.
Drive cannot start or supply power to its motor. STO trip
reported. If either of these conditions persists for more than
3.0 seconds (the maximum fault detection time), the STO
24V 0V
function will lock into a fault state. The drive cannot start until
the fault is rectified; all power is removed and reapplied (both
mains and any auxiliary 24V dc power).
This is single channel operation and thus deemed not as
0V 24V
intended for category 3 / PLe / SIL3 structure
implementation.
Drive is enabled to run under software control. The drive can
24V 24V
supply power to its motor.
Don't care Don't care Drive cannot start or supply power to its motor.
Drive Function
STO Status Output
X10/05, X10/06
ON
OFF
OFF
OFF
AC30 series Variable Speed Inverter