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Appendix - 56
Appendices
[3] Precautions during control
(1) Absolute position system (ABS)/Incremental system (INC)
At the ABS/INC setting, operation will be carried out by the setting of VCII
series/VPH series.
(2) Unlimited length feed
When using the virtual encoder pulse number function of VCII series/VPH
series, the unlimited length feed is available. When this function is not
used, the servo alarm 61468 (F01CH) "Absolute encoder over flow error"
occurs after "Encoder multiple revolution counter × Encoder reso
Encoder position within one revolution" exceeds the range of -2147483648
to 2147483647, and the operation stops.
(3) OPR
When "1" is set in the first digit of the parameter of VCII series "Select
function for SSCNET on communicate mode", it is possible to carry out
the home position return (OPR) without passing the zero point. (Return to
origin after power is supplied will be executed when passing of Motor Z
phase is not necessary.) When "0" is set, the error "OPR zero point not
passed" (error code: 210) occurs because the OPR is executed without
passing the motor Z phase (Motor reference position signal).
When "Zero return operation allowed." is set in the parameter of VPH series
"Marker transit selection", it is possible to carry out the OPR without passing
the Motor Z phase after power is supplied. When "Zero return operation
allowed after the marker is passed." is set, the error "OPR zero point not
passed" (error code: 210) occurs because the OPR is executed without
passing the motor Z phase.
(4) Control mode
Control modes that can be used are shown below.
• Position control mode (speed control including position control and position
loop)
• Speed control mode (speed control not including position loop)
• Torque control mode (torque control)
However, it is not available to switch to continuous operation to torque
control mode of expansion control "Speed-torque control". If the mode is
switched to continuous operation to torque control mode, the error
"Continuous operation to torque control not supported" (error code: 550)
occurs and the operation stops.
"1: Feedback torque" cannot be set in "Torque initial value selection (b4 to
b7)" of "
Pr.90
Operation setting for speed-torque control mode
". If it is set, the
warning "Torque initial value selection invalid" (warning code: 521) occurs
and the command value immediately after switching is the same as the case
of selecting "0: Command torque".
Summary of Contents for MELSEC-L Series
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Page 30: ...MEMO ...
Page 70: ...2 10 Chapter 2 System Configuration MEMO ...
Page 83: ...3 13 Chapter 3 Specifications and Functions MEMO ...
Page 103: ...3 33 Chapter 3 Specifications and Functions MEMO ...
Page 107: ...3 37 Chapter 3 Specifications and Functions MEMO ...
Page 111: ...3 41 Chapter 3 Specifications and Functions MEMO ...
Page 115: ...3 45 Chapter 3 Specifications and Functions MEMO ...
Page 140: ...4 22 Chapter 4 Installation Wiring and Maintenance of the Product MEMO ...
Page 253: ...5 113 Chapter 5 Data Used for Positioning Control MEMO ...
Page 342: ...5 202 Chapter 5 Data Used for Positioning Control MEMO ...
Page 438: ...7 20 Chapter 7 Memory Configuration and Data Process MEMO ...
Page 440: ...MEMO ...
Page 485: ...9 25 Chapter 9 Major Positioning Control MEMO ...
Page 594: ...9 134 Chapter 9 Major Positioning Control MEMO ...
Page 624: ...10 30 Chapter 10 High Level Positioning Control MEMO ...
Page 656: ...11 32 Chapter 11 Manual Control MEMO ...
Page 690: ...12 34 Chapter 12 Expansion Control MEMO ...
Page 798: ...13 108 Chapter 13 Control Sub Functions MEMO ...
Page 866: ...14 68 Chapter 14 Common Functions MEMO ...
Page 884: ...15 18 Chapter 15 Dedicated Instructions MEMO ...
Page 899: ...16 15 Chapter 16 Troubleshooting MEMO ...
Page 1036: ...Appendix 88 Appendices MEMO ...
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