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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
105
Chapter 6 Safety Functions
shows the timing of the Monitored SS1 operation, along with the
restart type behavior.
Figure 48 - Monitored Safe Stop 1
Safe Brake Control Function
The Safe Brake Control (SBC) function uses the module’s safety outputs to
control an electromechanical brake that is attached to the motor. The SBC
function releases the brake to allow motion or engages the brake to prevent
motion.
Safe Brake Control Activation
Safe Brake Control can be initiated by one or more sources:
•
SBC Output – Clearing the Safety Output Assembly Tag
(
devicename
:SO.SBCOutput1 = 0)
0x00
0x01 = SS1 Request
SS1 Active
Disable Torque
Torque Disabled
Restart Required
0x02 = SS1 Complete
SS1 Decel Ref Rate
Velocity
SI.RestartRequired
(3)
SI.STOActive
(3)
SI.SS1Active
(3)
SO.SS1Request
(1)
SS1 Activation
(2)
SI.TorqueDisabled
(3)
STO Activation
(2)
0x00
Required if Restart Type = Manual
SI.RequestReset
(1)
0x00
0x00
Standstill Speed
SS1 Request
SS1
Decel
Monitor
Delay
SS1 Max Stop Time
(1) Safety Output Assembly
(2) Safe Stop Function Attribute
(3) Safety Input Assembly
Restart Type = Automatic
Restart Type = Manual
Speed units are configured by the ‘Position Units’ and ‘Time Units’ Add-on
Profile Controls on the Scaling page.
A Configured Decel Reference Rate of 0 disables the ramp check. SS1 will
fault if the drive does not slow to less than the Standstill Speed within Max
Stop Time.