Mitsubishi Electric MELSEC-L Series, Руководство пользователя

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Chapter 8 OPR Control
8.2 Machine OPR
8.2.1 Outline of the machine OPR operation
Machine OPR operation
In a machine OPR, OP is established.
None of the address information stored in the Simple Motion module, PLC CPU, or
servo amplifier is used at this time. The position mechanically established after the
machine OPR is regarded as the "OP" to be the starting point for positioning
control.
M
OP
Near-point dog
Machine OPR
Fig. 8.3 Example of a machine OPR
The method for establishing an "OP" by a machine OPR differs according to the
method set in "
Pr.43 OPR method
".
The following shows the operation when starting a machine OPR.
When "
Pr.43 OPR method
" is set to other than "Driver OPR method"
1) The "machine OPR" is started.
2)
The operation starts according to the speed and direction set in the OPR parameters
(
Pr.43
to
Pr.57
).
3)
The "OP" is established by the method set in "
Pr.43
OPR method
", and the machine
stops. (Refer to Sections 8.2.2 to 8.2.7)
4)
If "a" is set as "
Pr.45
OP address
", "a" will be stored as the current position in the
"
Md.20
Current feed value
" and "
Md.21
Machine feed value
" which are monitoring the
position.
5) The machine OPR is completed.
POINT
Use the OPR retry function when the OP is not always in the same direction from
the workpiece operation area (when the OP is not set near the upper or lower limit
of the machine).
The machine OPR may not complete unless the OPR retry function is used.