Description Of Operation; Safe Torque-Off Assembly Tags - Allen-Bradley Kinetix 5700 User Manual

Description of Operation

The safe torque-off (STO) feature 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 motor is coasting.
Disabling the power transistor output does not provide isolation of the
electrical output that is required for some applications.
These conditions must be met for integrated control of the STO function:
• The Kinetix 5700 drive module must be added to the GuardLogix 5570
or Compact GuardLogix 5370 controller I/O Configuration.
• The module must be configured for Safety Only or Motion and Safety
connections
• The safety bypass jumper wires must be removed.
IMPORTANT If the STO bypass jumper wires were applied during machine
commissioning or maintenance, they must be removed before the drive
will operate in Integrated STO mode.
The Kinetix 5700 drive STO function reaction time is less than 10 ms.
Reaction time for the drive is the delay between the time the drive STO
command receives the CIP Safety™ packet with an STO request and the time
when motion producing power is removed from the motor.
Table 163 - Safe Torque-off Network Specifications
Attribute
STO function reaction time
Safety connection RPI, min
(1)
Input assembly connections
Output assembly connections
Integrated safety open request support
(1) Motion and Safety and Safety Only connections with the inverter uses 1 input assembly connection and 1 output assembly
connection.

Safe Torque-off Assembly Tags

In Integrated safe torque-off (STO) mode, a GuardLogix 5570 or Compact
GuardLogix 5370 safety controller commands the Kinetix 5700 safe torque-off
function through the appropriate tag in the safety output assembly.
IMPORTANT The tag names listed in
version 31 and later, depending on how Motion Safety is configured in the
Module Definition.
Rockwell Automation Publication 2198-UM002G-EN-P - February 2019
Kinetix 5700 Safe Torque-off Function
2198-xxxx-ERS3
10 ms, max
6 ms
3
(1)
1
Type 1 and Type 2 requests
Table 164 changed in the Logix Designer application,
Chapter 9
2198-xxxx-ERS4
1
325