Hitachi Vector Control with the SJ300 Inverter Application Note page 24

• Zero speed detection : ZS (21)
SJ300 gives out this signal when;
s
Actual rotation of the motor becomes less than a set value of [C063] under V2 mode.
s
PWM output frequency becomes less than a set value of [C063] under other than V2 mode.
‚ Speed deviation excessive : DSE (22)
DSE signal turns ON when an actual motor speed exceeds the set value of [P027] under V2 mode.
ƒ Positioning completion : POK (23)
POK signal turns ON when the motor stop position comes to a set range of [P017] during positioning.
Once it goes out of this range the signal turns OFF and perform positioning again.
© 2002 Hitachi America, Ltd.
24