16 - 7
Chapter 16 Troubleshooting
(3) Troubleshooting when a motor does not rotate as intended.
Check items and corrective actions for troubleshooting when a motor does not
rotate as intended are described below.
(a) When a motor rotates only in the opposite direction
Check item
Action
Is the value in "Rotation direction
selection/ travel direction
selection (PA14)" correct?
Check that the value in "Rotation direction selection/
travel direction selection (PA14)" matches the settings of
servo amplifier. When "Rotation direction selection/travel
direction selection (PA14)" has been changed, turn the
servo amplifier power supply ON again from OFF or reset
the controller, and execute the home position return.
(b) When a motor does not rotate at the set speed
Check item
Action
Does the value in "
Md.28
Axis feedrate
"
(Note)
indicate
the set speed?
[When "
Md.28
Axis feedrate
"
(Note)
indicates the set speed]
• Check that the values in "
Pr.2
Number of pulses per rotation (AP)
",
"
Pr.3
Movement amount per rotation (AL)
", and "
Pr.4
Unit
magnification (AM)
" meet the system.
• When the servo amplifier has the electronic gear function, check
that the settings meet the system.
[When "
Md.28
Axis feedrate
"
(Note)
does not indicate the set speed]
• Check that the speed is not limited by the value in "
Pr.8
Speed
limit value
".
• In the JOG operation, check that the speed is not limited by the
value in "
Pr.31
JOG speed limit value
".
• In the JOG operation, check that Forward run JOG start signal
and Reverse run JOG start signal do not repeatedly turn ON and
OFF.
Signal
LD77MS2/LD77MS4
LD77MS16
Forward run
JOG start signal
Y8, YA, YC, YE
Cd.181
Forward run
JOG start
Reverse run
JOG start signal
Y9, YB, YD, YF
Cd.182
Reverse run
JOG start
(Note): Speed control mode and continuous operation to torque control mode: "
Md.122
Speed
during command"
Summary of Contents for MELSEC-L Series
Page 2: ......
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 ...
Page 1039: ......