8 - 11
Chapter 8 OPR Control
Precautions during operation
(1) The error "Count method movement amount fault" (error code: 206) will occur
if the "
Pr.50
Setting for the movement amount after near-point dog ON
" is smaller
than the deceleration distance from the "
Pr.46
OPR speed
" to "
Pr.47
Creep
speed
".
(2) If the speed is changed to a speed faster than "
Pr.46
OPR speed
" by the speed
change function (refer to "13.5.1 Speed change function".) during a machine
OPR, the distance to decelerate to "
Pr.47
Creep speed
" may not be ensured,
depending on the setting value of "
Pr.50
Setting for the movement amount after
near-point dog ON
". In this case, the error "Count method movement amount
fault" (error code: 206) occurs and the machine OPR is stopped.
(3) The following shows the operation when a machine OPR is started while the
near-point dog is ON.
ON
1)
5)
4)
3)
2)
Zero signal
Near-point dog OFF
Pr. 50 Setting for the movement amount
after near-point dog ON
[Operation when a machine OPR is started at the
near-point dog ON position]
1) A machine OPR is started.
2) The machine moves at the OPR speed in the
opposite direction of an OPR.
3) Deceleration processing is carried out when
the near-point dog OFF is detected.
4) After the machine stops, a machine OPR is
carried out in the OPR direction.
5) The machine OPR is completed on detection
of the first zero signal after the travel of the
movement amount set to "
Pr.50
Setting for the
movement amount after near-point dog ON
" on
detection of the near-point dog signal ON.
Fig. 8.7 Count method 1) machine OPR on the near-point dog ON position
(4) Turn OFF the near-point dog at a sufficient distance from the OP.
Although there is no harm in operation if the near-point dog is turned OFF
during a machine OPR, it is recommended to leave a sufficient distance from
the OP when the near-point dog is turned OFF for the following reason.
If machine OPRs are performed consecutively after the near-point dog is
turned OFF at the time of machine OPR completion, operation will be
performed at the OPR speed until the hardware stroke limit (upper/lower limit)
is reached.
If a sufficient distance cannot be kept, consider the use of the OPR retry
function.
(5) When the stop signal stops the machine OPR, carry out the machine OPR
again. When restart command is turned ON after the stop signal stops the
OPR, the error "OPR restart not possible" (error code: 209) will occur.
(6) After the home position return (OPR) has been started, the zero point of the
encoder must be passed at least once before point A is reached.
However, if selecting "1: Not need to pass servo motor Z-phase after power
on" with "Function selection C-4 (PC17)", it is possible to carry out the home
position return (OPR) without passing the zero point.
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: ......