Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 202

7. SPECIAL ADJUSTMENT FUNCTIONS
The vibration tough drive function activates when a detected machine resonance frequency is within the range
of 30% in relation to the set value of parameters No. PB13 (machine resonance suppression filter 1) and No.
PB15 (machine resonance suppression filter 2).
The detection level of the vibration tough drive function can be set by parameter No. PC27 (detailed setting of
vibration tough drive).
The following shows the function block diagram of the vibration tough drive function.
The detected machine resonance frequency is compared with the parameters No. PB13 (machine resonance
suppression filter 1) and No. PB15 (machine resonance suppression filter 2), and the parameter No. which has
a set value closer to the detected machine resonance frequency is reset to the value of the detected frequency.
Updates the parameter whose
setting is the closest to the
machine resonance frequency.
Command Command
filter
input pulses
Torque
ON
Trouble (ALM)
OFF
ON
Warning (WNG)
OFF
ON
During tough
drive (MTTR)
OFF
When the vibration tough drive function activates, the number of tough drive in the display mode (alarm mode)
is increased by one. (Refer to section 5.5.)
POINT
Resetting of the parameters No. PB13 or No. PB15 by the vibration tough drive
function is performed constantly. However, the number of write times to the EEP-
ROM is limited to once per hour.
The machine resonance suppression filter 3 (parameter No. PB38) is not reset
by the vibration tough drive function.
Vibration tough drive
Parameter Parameter
No. PB13 No. PB15
Machine resonance Machine resonance
suppression filter 1 suppression filter 2
5s
Parameter
No. PB38
Machine resonance
suppression filter 3
Parameter No. PC27
(detailed setting of vibration tough drive)
Detects the machine resonance and reconfigures the filter automatically.
During tough drive (MTTR) is not turned on in the vibration
tough drive function.
7 - 3
Load
Encoder
PWM
M
Servo motor