468 Verification and validation
Validation of the SBC function
SBC function always uses the drive STO.
Drive STO is always activated immediately in the following cases/situations:
• FSO STO function
• SSE, when it is configured to be immediate STO
• SSE ramp or SS1 function is completed.
Validation of the delayed brake function
1. Check the wiring between the FSO module and safe brake, and make sure that
they are done correctly according to the design.
2. Make sure that the SBC function is configured correctly according to your design.
For a configuration example, see section How to configure the SBC in the STO
function on page 329. Check these settings:
Functionality:
• SBC.11 STO SBC usage = Delayed brake
• SBC.12 STO SBC delay
• SBC.13 SBC time to zero speed
• SBC.21 SBC output
• SBC.22 SBC feedback action
• SAFEIO.22 Safety relay 1 feedback
• SAFEIO.23 Safety relay 1 feedback type.
3. Check that the drive STO and the SBC are activated correctly based on your
application needs.
a) When positive STO SBC delay (SBC.12) is used: Check that the drive STO is
activated first and the SBC after the delay has elapsed.
Note: When an encoder is used: If the zero speed limit (FSOGEN.52) is reached
before the positive STO SBC delay (SBC.12) has elapsed, the FSO module
activates the SBC immediately when the motor speed is below the zero speed
limit.
b) When SBC.12 STO SBC delay is 0 ms, Check that the drive STO is activated
at the same time as the SBC.
c) When negative STO SBC delay (SBC.12) is used: Check that the SBC is
activated first and the drive STO after the delay has elapsed.
4. Make sure that the required failure reaction (SBC.22) takes place if there is no
SBC feedback signal (SAFEIO.22). For example, disconnect the SBC feedback
cable to verify.
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