Hitachi SJ Series - SFS Function

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Chapter 4
Safety Function
4.6 SFS function
SFS function is activated during activating SS1, SLS and SDI
when the detected speed is out of determined speed
range.
■Timing chart
e.g. Case: The SS1-A active time is passed, [1-22]SS1-A
monitoring method=00(Time):
e.g. Case: The speed becomes out of range in SS1-B, [2-
22]SS1-B monitoring method = 01 (speed):
SFS function can be selectable from either STO/SS1/SBC.
e.g. Case: The speed becomes out of range SLS-A:
e.g. Case: The direction becomes out of range SDI-B, [2-
51]SDI-B active mode=00 limit CW (RV):
Motor speed
[1-21]SS1-A Zero frequency
SFS
[1-23]SS1-A Active time
[0-08]SFS reaction time
Motor speed
[2-21]SS1-B Zero frequency
SFS
[2-26]SS1-B wait time
[2-24]SS1-B Min Deceleration time
[2-25]SS1-B Max Deceleration time
[0-08]SFS reaction time
Motor speed
SFS
[1-41]SLS-A frequency limit CCW/FW
[0-08]SFS reaction time
Motor speed
[2-21]SDI-B Zero frequency
SFS
[0-08]SFS reaction time