Mitsubishi Electric MELSEC-L LD75D, User Manual

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CHAPTER 6 PROGRAM USED FOR POSITIONING CONTROL
6
6.
5 Pr
ogram Det
a
ils
6.5.6
Stop program
The axis stop signal [Y4, Y5, Y6, Y7] or a stop signal from an external source is used to stop the control.
Create a program to turn ON the axis stop signal [Y4, Y5, Y6, Y7] as the stop program.
The process for stopping control is explained below. Each control is stopped in the following cases.
• When each control is completed normally.
• When the drive unit READY signal is turned OFF.
• When a CPU module error occurs
• When the PLC READY signal is turned OFF.
• When an error occurs in the LD75.
• When control is intentionally stopped (Stop signal from CPU module turned ON, stop signal from an external
device, etc.)
The stop process for the above cases is shown below. (Excluding the case when control is completed normally.)
(1) Stop process
(a) OPR control
Stop cause Stop axis
M code ON
signal after stop
Axis operation
status ([Md.26])
after stopping
Stop process
Machine OPR control Fast OPR control
Forced stop
Drive unit READY signal
OFF
Each axis No change Error Immediate stop
Fatal stop
(Stop group 1)
Hardware stroke limit
upper/lower limit error
occurrence
Each axis No change Error
Deceleration stop/sudden stop
(Select with "[Pr.37] Stop group 1 sudden stop
selection".)
Emergency stop
(Stop group 2)
CPU module error
occurrence
All axes
No change
Error
Deceleration stop/sudden stop
(Select with "[Pr.38] Stop group 2 sudden stop
selection".)
PLC READY signal OFF Turns OFF
Error in test function No change
Relatively safe stop
(Stop group 3)
Axis error detection
(Error other than stop
group 1 or 2)
Each axis No change Error
Deceleration stop/sudden stop
(Select with "[Pr.39] Stop group 3 sudden stop
selection".)
Intentional stop
(Stop group 3)
"Stop signal" ON from
external source
Each axis No change
Stopped
(Standby)
"Axis stop signal" ON
from CPU module
"Stop signal" from GX
Works2