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External Baseblock Signal
If the External Baseblock Command (settings 12 and 13 of n050 to
n056) is input while the motor is running, the motor will immediately
coast to a stop. Do not input the External Baseblock Command while
the motor is running unless necessary.
If using the External Baseblock Command for an emergency stop or to
start run of an interlock, make sure that the holding brake operates.
If the External Baseblock Command is input and immediately reset, the
Inverter does not output voltage during the minimum baseblock time,
which is 0.5 to 0.7 seconds depending on the Inverter capacity. Do not
use the External Baseblock Command in an application where the motor
is frequently stopped and started.
Acceleration/Deceleration Time
If the delay time for the holding brake's mechanical operation is not
taken into consideration and the acceleration/deceleration time on the
Inverter side is set to a time that is too short, an overcurrent or wear on
the brakes may occur at starting or the load will shift at stopping
because the holding brake does not operate on time. If so, use the S-
curve characteristic function or lengthen the acceleration/deceleration
time to tune the timing for the holding brake.
Contactor on the Inverter's Output-side
Do not install a contactor between the Inverter and the motor.
If a contactor must be installed because of local electrical codes or regu-
lations or to operate motors with an Inverter, excluding emergencies,
open or close the contactor only where the holding brake is fully closed
and the Inverter is in baseblock status with the baseblock signal ON.
If the contactor is opened or closed while the Inverter is controlling the
motor or DC injection braking, surge voltage or a current from the
motor by full-voltage starting may cause an Inverter fault.
When a contactor is installed between the Inverter and the motor, enable
the I/O open-phase protection (n166 to n169).
For more information on using Inverters exclusively for elevators or cranes,
contact your OMRON representatives or the nearest OMRON sales office.
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