
B-65270EN/05 3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT
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NOTE
1 For alarms with no action number indicated, refer
to the Maintenance Manual.
2 OVL = 1, ALD = 1, and EXP = 1 indicate an
overheat alarm using DI signals in a linear motor or
a synchronous built-in servo motor and are set
when bit 7 of parameter No. 2713 (Series 15i) or bit
7 of parameter No. 2300 (Series 30i, 16i, and so
on) is set to 1. When these alarms are issued, take
the same action as for ordinary motor overheat
alarms. (See the description of overheat alarms in
linear motors and synchronous built-in motors in (7)
in Subsection 4.14.1, "Procedure for Setting the
Initial Parameters of Linear Motors".)
Action 1: Overcurrent alarms
This type of alarm occurs when an extremely large current flows
through the main circuit.
When an overcurrent alarm always occurs after emergency stop is
released or at the time of moderate acc./dec., the cause of the alarm is
determined to be an amplifier failure, cable connection error, line
disconnection, or a parameter setting error. First, check that standard
values are set for the following servo parameters. If these parameter
settings are correct, check the amplifier and cable status by referring
to the maintenance manual on the servo amplifier.
No. 1809 No. 1852 No. 1853
No. 2004 No. 2040 No. 2041
(Parameters for the Series 15i are indicated on the upper side, and
parameters for the Series 30i, 16i, and so on are indicated on the lower
side.)
If an overcurrent alarm occurs only when an strong acc./dec. is
performed, the operating conditions may be too abrupt. Increase the
acc./dec. time constant, and see whether the alarm occurs.
CAUTION
When an emergency stop is released with the
power line to the motor disconnected, an
overcurrent alarm (software) may occur. If this
poses a problem, set the following parameter bit to
1:
Bit 0 of parameter No. 1747 (Series 15i) or bit 0 of
parameter No. 2207 (Series 30i, 16i, and so on) :
Ignores the overcurrent alarm (software).