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Chapter 7
iTRAK 5730 System Integrated Safety
Safe Torque-off (STO)
Function
162
6. In the Configuration Ownership field, click Reset Ownership.
IMPORTANT
If any active connection is detected, the reset is rejected.
7. Cycle power.
The motor module is in the out-of-box state.
IMPORTANT
IMPORTANT
The STO function, when used with suitable safety components, provides
protection according to ISO 13849-1 (PLe), Category 3 or according to
IEC 61508, IEC 61800-5-2, and IEC 62061 (SIL CL3). All components in the
system must be chosen and applied correctly to achieve the desired level of
operator safeguarding.
The STO feature is designed to safely turn off all of the output power
transistors. You can use the STO feature in combination with other safety
devices to achieve Stop Category 0 and protection-against-restart as specified
in IEC 60204-1.
ATTENTION: The STO feature is designed to restrict motion producing power on the
drive system or affected area of a machine. The STO feature does not provide
electrical safety.
SHOCK HAZARD: In STO mode, hazardous voltages can still be present at the drive.
To avoid an electric shock hazard, disconnect power to the system and verify that
the voltage is zero before performing any work on the drive.
ATTENTION: Personnel responsible for the application of safety-related
programmable electronic systems (PES) shall be aware of the safety requirements
in the application of the system and shall be trained in using the system.
Safe Torque-off (STO) Function Operation
The STO function provides a method, with sufficiently low probability of
failure, to force the power-transistor control signals to a disabled state. When
the command to execute the STO function is received from the GuardLogix
controller, all of the drive output-power transistors are released from the ON-
state. This results in a condition where the drive coasts. Disabling the power
transistor output does not provide mechanical isolation of the electrical output
that is required for some applications.
Rockwell Automation Publication 2198T-UM003A-EN-P - May 2020
Only authorized personnel should attempt Reset Ownership.
If power to the motor module is not cycled after
does not transition to the out-of-box state and maintains STO
function.
When the motor module returns to the out-of-box state, STO safety
integrity is lost.
step
6, the module
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