Sto Software Functional Diagram; Monitoring The Delay Between The Sto Inputs; Sto Function Activation And Indication Delays - ABB MicroFlex e190 User Manual

198 Appendix: Safe Torque Off (STO)
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STO software functional diagram:

MicroFlex e190
X4:1
STO1
X4:2
STO2

Monitoring the delay between the STO inputs

The STO function monitors the switching time difference between the STO inputs.
See Operation of the STO function and diagnostics

STO function activation and indication delays

Hardware activation delay (the delay between removing power from an STO input
and switching off the drive output bridge): < 50 ms.
Hardware indication delay (the delay between switching off the drive output bridge
and being indicated to the Mint program): < 50 ms.
Software STO indication delay, Mint program (the delay between a mismatch
occurring on the STO inputs and being indicated to the Mint program): < 200 ms user
defined period, set by STOINPUTMISMATCHTIME.
STO
STO1
STO2
SAFETORQUEOFF(1)
SAFETORQUEOFF(2)
SAFETORQUEOFF(6)
SAFETORQUEOFF(0)
on page 195.