Rockwell Automation Publication 35-UM001A-EN-P - May 2022
93
Chapter 6 Safety Functions
Figure 37 - System Operation when Safety Enable Inputs Mismatch Occurs
Figure 38 - System Operation in the Event That the Safety Enable Inputs Mismatch Momentarily
Letter
Description
A
Set Safety Input SI0 = 0 volts
B
Discrepancy fault after 0.9 seconds
C
Set Safety Input SI1 = 0 volts
D
Discrepancy fault cleared after 1.0 seconds
E
Set Safety Input SI0 = 24 volts
F
Set Safety Input SI1 = 24 volts
G
Clear Armor PowerFlex Fault
Letter
Description
A
Set Safety Input SI0 = 0 volts
B
Discrepancy fault after 0.9 seconds
C
Set Safety Input SI1 = 0 volts
D
Discrepancy fault cleared after 1.0 seconds
E
Set Safety Input SI0 = 24 volts
F
Set Safety Input SI1 = 24 volts
G
Clear Armor PowerFlex Fault
ATTENTION:
The STO fault is detected upon demand of the STO
function. After troubleshooting, a safety function must be executed to
verify correct operation.
0.9
A
C
D
B
G
E
F
0.9
1.0
(Safety Input) SI0
(Safety Input) SI1
Safety State
Safety Fault
STO Active
Torque Disabled
24V
24V
8 = Waiting
51 = Wait w Trq
51
Faulted
Disable Torque
Torque Disabled
0.9
A
C
D
B
G
E
F
0.9
1.0
(Safety Input) Si0
(Safety Input) Si1
Safety State
Safety Fault
STO Active
Torque Disabled
8 = Waiting
Faulted
Disable Torque
Torque Disabled
24V
24V
51
51 = Wait w Trq
