5
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Positioning Control Edition
Table of Contents
4.2.8 Setting of Deceleration Time ......................................................................................................B-45
4.3 Various Special Relays for Operation Commands.....................................................................B-46
4.3.1 Forward Rotation Limit and Reverse Rotation Limit...................................................................B-46
4.3.2 Immediate Stop of Pulse Output (Pulse Output Stop Command Relay) ....................................B-47
4.3.3 Designation of Zero Return Direction (DSZR/ZRN Instruction) ..................................................B-47
4.3.4 CLEAR Signal Output (DSZR/ZRN Instruction)..........................................................................B-49
4.3.5 Change in Logic of Near-Point (DOG) Signal (DSZR Instruction)..............................................B-50
4.3.6 Change in Logic of Zero-Phase Signal (DSZR Instruction)........................................................B-50
4.3.7 Designation of Interrupt Input Signal for DVIT Instruction ..........................................................B-51
4.3.8 Change in Logic of interrupt input Signal (DVIT Instruction) ......................................................B-52
4.3.9 Acceleration/Deceleration by PLSV Instruction ..........................................................................B-53
4.4 Current Value and Flag for Monitoring of Operation ..................................................................B-54
4.4.1 Current Value .............................................................................................................................B-54
4.4.2 Completion of Instruction Execution
("Instruction execution complete" Flag, "Instruction execution abnormal end" Flag).............B-55
4.4.3 "Pulse Output Monitor" (BUSY/READY) Flag.............................................................................B-55
4.4.4 "Positioning Instruction Activation" Flag .....................................................................................B-55
4.5 Setting of Various Items on PLC Side........................................................................................B-56
4.5.1 Setting of Common Items Using Program ..................................................................................B-56
4.5.2 Setting of High-Speed Output Special Adapter ..........................................................................B-60
4.6 Setting of Various Items on Servo Amplifier (Drive Unit) Side ...................................................B-62
4.6.1 Setting the Command Pulse Method..........................................................................................B-62
4.6.2 Setting of Electronic Gear (For MELSERVO Series)..................................................................B-66
4.6.3 Setting of "Servo Ready" Signal (MELSERVO MR-C Series) ....................................................B-67
4.7 Items To Be Observed in Programming.....................................................................................B-68
4.7.1 Positioning Instruction Activation Timing....................................................................................B-68
4.7.2 STOP instruction ........................................................................................................................B-70
4.7.3 Correction of Backlash ...............................................................................................................B-70
4.7.4 "Instruction execution complete" Flag of Positioning Instruction
and Completion of Positioning ...............................................................................................B-70
4.7.5 Operation Error Flag...................................................................................................................B-73
4.7.6 Write during RUN .......................................................................................................................B-73
4.8 Items To Be Observed When Using the Main Unit (Transistor Output) .....................................B-74
4.9 Caution for Using the High-Speed Output Special Adapter (FX
3U-2HSY-ADP)........................B-74
4.10 Format and Execution of Applied Instruction ...........................................................................B-76
5. Operation Test B-78
5.1 Test Procedure...........................................................................................................................B-80
5.2 Creation of Test Program...........................................................................................................B-84
6. Mechanical Zero Return (DSZR/ZRN Instruction) B-86
6.1 Types of Mechanical Zero Return Instructions...........................................................................B-86
6.2 DOG Search Zero Return (DSZR Instruction)............................................................................B-87
6.2.1 Instruction Format.......................................................................................................................B-87
6.2.2 List of Related devices ...............................................................................................................B-88
6.2.3 Function and Operation..............................................................................................................B-90
6.2.4 Important Points .........................................................................................................................B-96
6.3 Zero Return (ZRN Instruction)....................................................................................................B-98
6.3.1 Instruction Format.......................................................................................................................B-98
6.3.2 List of Related devices ...............................................................................................................B-99
6.3.3 Function and operation.............................................................................................................B-100
6.3.4 Important Points .......................................................................................................................B-104
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