Verification and validation 469
Validation of the speed limit activated SBC
This feature is possible with:
• the safe speed estimate with the SS1 or SSE ramp
• the safety encoder with the SS1 or SSE ramp, and with the STO function.
Procedure:
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 chapter How to configure the SBC in the STO
function on page 329. Check these settings:
Functionality:
• SBC.11 STO SBC usage = speed limit
• SBC.12 STO SBC delay
• SBC.13 SBC time to zero speed
• SBC.14 STO SBC speed speed > 0 rpm
• SBC.15 SSE/SS1 SBC speed > 0 rpm
• 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.
4. Check that the brake is activated at the correct speed.
a) When SBC.12 STO SBC delay is 0 ms or greater, check that the SBC and drive
STO is activated at the same time at the speed limit. With the STO function this
parameter does not have any effect.
b) When a negative SBC.12 STO SBC delay is used: Check that the SBC is
activated at the speed limit, and the drive STO after the delay has elapsed. This
parameter is only relevant for the SS1 or SSE ramp and for the STO function in
the encoder failure situation.
5. 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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