E1 Series Servo Drive User Manual Safety Function
12-6 HIWIN MIKROSYSTEM CORP.
12.2.6 Drive ready output (D-RDY) signal
When servo on input (S-ON) signal is input in STO state, drive ready output (D-RDY) signal will still be
OFF. When SF1 and SF2 signals are both ON and servo on input (S-ON) signal is OFF, drive ready
output (D-RDY) signal will be ON.
Figure12.2.6.1
12.2.7 Brake control output (BK) signal
When SF1 and SF2 signals are OFF and STO safety function is enabled, brake control output (BK) signal
is OFF. At this time, Pt506 (Brake command-servo off delay time) has no function. Therefore, before the
brake operates, the motor could move due to external force or gravity after brake control output (BK)
signal is OFF.
Since brake control output (BK) signal and STO safety function operate independently, while designing your
system, ensure even when brake control output (BK) signal malfunctions in STO state, there will be no danger.
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