QSHT 5700 Inverter Safe Torque-off Function
Introduction
QuickStick HT User Manual
267
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Safe Torque-off Status
This section describes the safety-related status data that is available to the host controller.
When a QSHT 5700 inverter user-defined tag (UDT) is added to a Logix Designer applica-
tion, fault tags are added to the inverter tags.
lists the safety-related tags and other
new tags that are added to the MMI_path_qs_ht_faults_status tag described in
Host Controller EtherNet/IP Communication Protocol User
Manual
, for a complete description of the tag and descriptions of the faults and
their resolution. See
QSHT 5700 Inverter Fault Troubleshooting
for details of the
safety faults and user actions.
IMPORTANT
The status data described in this section is STANDARD data
(not SAFETY data) and cannot be used as part of a safety
function.
Table 7-2: Safety-Related Axis Tags – MMI_path_qs_ht_faults_status
Name
Bit
Fault
Definition
Action
Master
Board
Faults
3
Safety Core
Fault
Communication to the safety
core has timed out.
• Reset the unit.
• Program the core.
• If problem persists, return the unit.
4
Aux Core
Fault
Communication to the aux core
has timed out.
• Reset the unit.
• Program the core.
• If problem persists, return the unit.
Block
n
Inverter
Faults
4
Guard Stop
Request
Status
The inverter's gate drivers are
disabled due to a STO function
from the safety core.
• Check the Safety Core Faults.
• If problem persists after a power cycle,
replace the motor controller.
7
Gate driver
undervolt-
age lockout
The inverter board detects an
undervoltage level on the gate
drivers.
If problem persists after a power cycle,
replace the motor controller.
9
Power Sup-
ply Not
Ready
The inverter board has not
received a state update that the
power supply is in the running
state.
—
10
Fuse Open
The inverter board fuse is
detected open.
Replace the motor controller.