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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
Chapter 6 Safety Functions
When the SBC function is activated by clearing the
devicename
:SO.SBCOutput
tag, the associated safety outputs are de-energized, which forces the brake to
engage, and torque is still enabled.
attributes when the SBC function is executed independently.
Figure 50 - SBC Operation by Safety Output Assembly
STO Activates SBC Operation
If the SBC function is configured to link STO and SBC activation, any STO
activation will cause the SBC function to be activated as well. The brake is
engaged (de-energized) by the SBC function when torque is disabled by the
STO function.
If the SBC function is configured to link STO activation to SBC activation, you
can configure an STO to SBC Delay time where:
•
STO to SBC Delay > 0 configures a delay between when STO is activated
and the brake is engaged.
describes this operation.
•
STO to SBC Delay < 0 configures the brake to engage when STO is
activated and delays disabling torque.
describes this operation.
Engage Brake
Torque Enabled
0x01 = SBC Output
Brake Engaged
Restart Required
Required If Restart Type = Manual
Engage Brake
(1) Safety Output Assembly
(2) Safe Stop Function Attribute
(3) Safety Input Assembly
(4) 24V DC Safety Output
Restart Type = Automatic
Restart Type = Manual
SO.ResetRequest
(1)
SI.BrakeEngaged
(3)
SBC Activation
(2)
SO.SBCOutput
(1)
SI.TorqueDisabled
(3)
So0 and So1
(4)
SI.SBCActive
(3)
Brake Engaged
0x00