Sdi With Ramp Monitoring - ABB FSO-21 User Manual

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SDI with ramp monitoring

This applies when the motor rotates into the forbidden direction when the SDI is
activated and the ramp monitoring method is used. The SDI positive function is used
as an example.
Motor speed
1
A
A Zero speed with encoder (parameter FSOGEN.52): Speed limit to define the motor as
stopped. The safety function is completed and the STO completed indication (parameter
STO.22) goes on. The STO acknowledgment becomes allowed.
Ramp monitoring limits
2
3b
- -> Safe torque off (STO)
2b
Safety functions 155
3
4
Time
SDI request
SDI state &
indication
SAR1
monitoring
STO state &
indication (2b)