12 - 106
MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.8.2 Follow up function
(1) Follow up function
The follow up function monitors the number of motor rotations (actual present
value) with the servo OFF and reflects the value in the present feed value.
Therefore, even if the servomotor rotates while the servo OFF, the servomotor
will not just rotate for the quantify of droop pulses the next time the servo turns
ON but positioning can be performed from the stop position.
(2) Execution follow up
Follow up function is executed continually during the servo OFF status.
OFF
Follow up function executed
ON
0
All axis servo ON (Y1)
Each axis servo OFF
command
Servo ON or OFF status
OFF
ON
Servo error detected
Fig. 12.56 Operation timings of follow up function
POINT
The follow-up function performs the process if the "QD75MH and the servo
amplifier is turned ON" and "servo OFF" regardless of the presence of the
absolute position system.
Summary of Contents for QD75MH1
Page 17: ...A 16 MEMO ...
Page 19: ...MEMO ...
Page 66: ...3 11 MELSEC Q 3 SPECIFICATIONS AND FUNCTIONS MEMO ...
Page 97: ...4 18 MELSEC Q 4 INSTALLATION WIRING AND MAINTENANCE OF THE PRODUCT MEMO ...
Page 102: ...5 5 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 110: ...5 13 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
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Page 269: ...5 172 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 290: ...6 21 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
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Page 348: ...7 7 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS MEMO ...
Page 352: ...7 11 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS MEMO ...
Page 363: ...MEMO ...
Page 495: ...9 116 MELSEC Q 9 MAJOR POSITIONING CONTROL MEMO ...
Page 557: ...11 36 MELSEC Q 11 MANUAL CONTROL MEMO ...
Page 689: ...14 18 MELSEC Q 14 DEDICATED INSTRUCTIONS MEMO ...
Page 751: ...Appendix 2 MELSEC Q APPENDICES MEMO ...