Mitsubishi Electric MELSERVO-JN Series, Инструкция по эксплуатации

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7. SPECIAL ADJUSTMENT FUNCTIONS
7. SPECIAL ADJUSTMENT FUNCTIONS
7.1 Tough drive function
POINT
Enable or disable the tough drive function by parameter No. PA04 (tough drive
function selection). (Refer to section 4.1.5.)
The tough drive function continues the operation not to stop a machine in such situations when normally an
alarm is activated.
7.1.1 Overload tough drive function
CAUTION
When the overload tough drive activates, the operation pattern is changed. Check
in advance if equipment problems due to the change of operation pattern do not
occur. The operation pattern at the overload tough drive can be checked with the
forced tough drive operation in the test operation mode. (Refer to section 5.10.5.)
The overload tough drive function automatically reduces the load ratio to about 70% to avoid an alarm when
the effective load ratio increases to near the overload alarm level. When the overload tough drive activates, the
servo amplifier delays the time for the in-position (INP) and the zero speed (ZSP) to turn on. In the position
control mode, the controller holds the next command until the in-position (INP) turns on. In the positioning
mode, the controller holds the output of position command until the in-position (INP) turns on.
The during tough drive (MTTR) can be output from the servo amplifier by setting parameter No. PD20 (function
selection D-1) to " 1 ".
POINT
The overload tough drive function is available only in the position control mode or
in the positioning mode.
The increase in the load ratio that is caused by temporary load fluctuations can
be avoided by reducing the machine tact (operating time) so that the operation
can be continued. An optimum in-position (INP) delay time is calculated
automatically on the servo amplifier side.
The maximum delay time of the in-position (INP) can be limited by parameter No.
PC26 (detailed setting of overload tough drive) so as not to cause INP timeout
error on the controller side.
Interlock the next start
command until the INP is
turned on for the controller.
MTTR (during tough drive) is
detected on the controller side.
Controller
Turns on during the tough
drive.
*Valid/invalid can be changed
in parameter No. PD20.
Servo amplifier
During tough drive (MTTR)
In-position (INP)
Zero speed (ZSP)
Command input pulses
Delay the time for " ON" only
for the optimum value that
can avoid alarm.
Command start signal