Status Of Safety Function - Altivar Process ATV630 Function Manual

Status of Safety Function

Description
If...
Safe Torque Off (STO) is not active
STO is triggered
[Safety Function Error] SAFF
detected fault occurs (1)
(1) Possible causes are exceeded delay between STOA and STOB signals > 1 s and internal hardware detected error.
20
Then ...
the orange LED is OFF
the power bridge is locked by redundant hardware
the orange LED is steady ON
STO is displayed
the power bridge is locked
the orange LED is steady ON
the red LED is steady ON
the Graphic Display terminal displays StO then SAFF
EAV64334 06/2017