Safe Torque Off Fault Reset - Allen-Bradley PowerFlex 755 User Manual

Safe Torque Off Fault Reset

Host Config [P4] Safety Status (bit 0)--->Safety Fault
Host Config [P4] Safety Status (bit 1)--->Safety Reset
Host Config [P4] Safety Status (bit 2)--->Restart Req
Host Config [P4] Safety Status (bit 3)--->STO Active
Host Config [P4] Safety Status (bit 4)--->Trq Disabled
Host Config [P5] Safety Status (bit 3)--->STO Fault
Drive Start Inhibits (bit 7)
Drive Fault Status B (bit 9)
1
Drive Start Inhibits is parameter 933 in PowerFlex 755 drives and parameter 603 in PowerFlex 755T drive products.
2
Drive Fault Status B is parameter 953 in PowerFlex 755 drives and parameter 462 in PowerFlex 755T drive products.
To clear the STO Fault condition, a transition from logic 0 to 1 of the
SO.Reset tag is required.
If the drive safety controller detects a fault, the input assembly tag
SI.SafetyFault is set to 1.
IMPORTANT All PowerFlex 755 drives and PowerFlex 755T drive products enter the
See Figure 4 on page 47
PowerFlex 755T drive products state restart functionality.
Figure 4 - Reset Safe Torque Off Fault Diagram
Disable Torque
SO.SafeTorqueOff (bit 0)
SO.Reset (bit 7)
SI.TorqueDisabled (bit 0)
No Fault
SI.SafetyFault (bit 6)
SI.ResetRequired (bit 7)
1
--->Safety
2
No Fault
--->SafetyBrdFlt
A. Set SO.SafeTorqueOff = 1
C. Set SO.SafeTorqueOff = 0
B. FaultDetected
D. Set SO.SafeTorqueOff = 1
Rockwell Automation Publication 750-UM004B-EN-P - October 2018
Standard I/O – Network STO Programming and Operation
faulted state if any STO function fault is detected. See
page 83 for integrated safety troubleshooting.
for an understanding of the PowerFlex 755 drive and
Permit Torque
Reset Request
Torque Disabled
Faulted
Reset Required
Faulted
Reset Request
Reset Required
Disable Torque
Torque Disabled
Faulted
Start Inhibited
Faulted
A B C
E. Set SO.ResetRequest = 1
F. PF 755 Clear Fault (I/O Mode) or MAFR (CIP Motion™)
Chapter 4
Table 16 on
D E F
47