IAI America PCON-CFA - Manual (Page 144)

4. SCON-CA
138
(28) Standstill control mode (SMOD) PLC output signal
One general characteristic of pulse motors is that their holding current in a standstill state is greater than that of
AC servo motors. Accordingly, a means to reduce power consumption in a standstill state is provided as an
energy-saving measure to address situations where the actuator remains standstill for a long period at a standby
position.
SMOD = ON: Use the full-servo control mode during standby
SMOD = OFF: Normal standby mode
x Full-servo
control mode
The holding current can be reduced by servo-controlling the pulse motor.
Although the specific level of reduction varies according to the actuator model, load condition, etc., the holding
current will decrease to approx. 1/2 to 1/4.
The actual holding current can be checked on the current monitor screen of the PC software.
(Note) Micro-vibration or noises may occur in conditions where the actuator is subject to external forces or
depending on the standstill position.
Before using this mode, confirm that the overall system will not be negatively affected.