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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
Chapter 6 Safety Functions
Figure 44 - Safe Stop 1 Fault Operation
Timed Safe Stop 1
A Timed Safe Stop 1 involves initiating motor deceleration and initiating the
STO function after the configured time delay.
Timed Safe Stop 1 Operation
When the Armor PowerFlex drive is configured for Timed Safe Stop 1 Mode,
the Safe Stop 1 function is initiated by setting the
devicename
:SO.SS1Request1
safety output tag. This sets the ‘SS1 Request’ bit in the SS1 Activation attribute
and sets the
devicename
:SI.SS1Active safety input tag.
The SS1 function waits for the configured SS1 Max Stop Time, then sets the SS1
Complete flag in the STO Activation attribute, which sets STO Active to Disable
Torque. In Timed Safe Stop 1 mode, speed and deceleration are not monitored
so this mode does not require Safety Feedback.
SS1 status and torque attributes in response to an SS1 activation, along with
the restart type behavior.
0x00
0x01 = SS1 Request
SS1 Active
3 = Deceleration Rate
Torque Disabled
Restart Required
Safety Fault
Fault Occurs
(Feedback Velocity > Expected Velocity)
Velocity
SI.STOActive
(3)
SI.SS1Active
(3)
SO.SS1Request
(1)
SS1 Activation
(2)
SI.TorqueDisabled
(3)
S1.SafetyFault
(1)
0x00
Always Required to Reset a Fault
0x00
0x00
Standstill Speed
SS1 Request
SS1 Max Stop Time
(1) Safety Output Assembly
(2) Safe Stop Function Attribute
(3) Safety Input Assembly
SS1 Max Stop Time
Disable Torque
0x04 = Safety Stop Fault
1 = No Fault
SO.RequestReset
(1)
SI.RestartRequired
(3)
STO Activation
(2)
SS1 Fault Type
(2)
Coast-to-stop