Mitsubishi A1SD75M3 User Manual page 256

5 DATA USED FOR POSITIONING CONTROL
Storage item
Md.117 Regenerative load ratio
Md.118 Effective load ratio
*1
Md.119 Peak load ratio
Md.120 FeRAM access count
Md.121 Absolute position
restoration mode
*1: During any of the following processings, " Md.117 Regenerative load ratio", " Md.118 Effective load ratio" and
" Md.119 Peak load ratio" storage buffer memory data are not updated.
During the processing, therefore, a delay may occur in the updating of the " Md.117 Regenerative load ratio", " Md.118
Effective load ratio" and " Md.119 Peak load ratio" storage buffer memory data.
•
When a machine zero point return is made (when ZCT is read, when the absolute position reference point is read)
•
When initial communication is being made with the servo amplifier
•
When the PLC READY signal [Y1D] is turned from OFF to ON
•
When the servo parameters are updated with the "AD75M servo position control gain function" of GX Configurator-AP
(For details of GX Configurator-AP, refer to the GX Configurator-AP Operating Manual.)
•
The average value of the ratios of the regenerative load to the allowable value of
the regenerative brake resistor selected in the servo basic parameter for the past
*1
15 seconds is stored. (Unit: 1%)
•
The update timing is 1 second interval.
•
The average value of the ratios of the load to the rated torque of the servomotor
*1
for the past 15 seconds is stored. (Unit: 1%)
•
The update timing is 1 second interval.
•
The held value of the ratio of the peak load to the rated torque of the servomotor
is stored. (Unit: 1%)
•
The update timing is 1 second interval.
•
The FeRAM access count is stored.
•
The value is incremented by "3" at power-on.
•
Increase of the value at a machine zero point return in the absolute position
detection system
(a) When " Md.121 Absolute position restoration mode" is switched between the
"standard mode" and "infinite length mode", the value is incremented by "4".
(b) When " Md.121 Absolute position restoration mode" is not switched, the
value is incremented by "2".
•
The update timing is 56.8ms.
•
The mode for absolute position restoration is stored in the axis where " Pr.1
Unit setting" is "2: degree" and absolute position detection is valid.
(Set timing)
At power-on
At completion of machine zero point return
•
The update timing is 56.8ms.
Refer to section 12.6.2 for details of mode switching for absolute position
restoration.
Storage details
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MELSEC-A