IAI America PCON-CFA - Manual (Page 147)

3. SCON-CA/CF
A
139
(28) Stopping control mode (SMOD) PLC output signal
One of the pulse motor general characteristics is that that the holding current in the stop mode is larger than
that for the AC servo-motor. Because of this, when the stop time is longer at the standby position, the
measure to reduce the power consumption at the stop mode is taken as one of the energy saving
measures.
SMOD=ON: Full Servo Control System is used in the standby condition.
SMOD=OFF: Standby condition
x Full-servo control mode
By means of servo control of the pulse motor, the holding current can be reduced.
The reduction level varies depending on the actuator type or load conditions. However, generally, the
holding current will be 1/2 to 1/4.
The actual holding current can be confirmed in the current monitor window in the PC software.
(Note) Under the condition where any external force is given or depending on the stop position, slight
vibration or abnormal noise might be caused.
Before implementing this feature, take care to investigate its effects on the whole system in a controlled
manner.