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1 PRODUCT OUTLINE
1.2.3 Outline of stopping
Stop cause
"Forced stop
input signal
from external
device" OFF
Servo
READY OFF
• Servo amplifier
Forced stop
power supply
OFF
• Servo alarm
• Forced stop
input to servo
amplifier
Hardware
stroke limit
Fatal stop
upper/lower
(Stop group 1)
limit error
occurrence
Error occurs
in PLC CPU
Emergency
PLC READY
stop
signal OFF
(Stop group 2)
Error in test
mode
Axis error
detection
(Error other
than stop
Relatively safe
group 1 or 2)
stop
(Stop group 3) "Stop signal"
from
peripheral
device
Each control is stopped in the following cases.
(1) When each control is completed normally.
(2) When the Servo READY signal is turned OFF.
(3) When a PLC CPU error occurs.
(4) When the PLC READY signal is turned OFF.
(5) When an error occurs in the QD75MH.
(6) When control is intentionally stopped (Stop signal from PLC CPU turned ON, stop
signal from an external device, etc.).
The outline for the stopping process in these cases is shown below. (Excluding (1) for
normal stopping.)
Axis
operation
M code
status
Stop
ON signal
after
axis
after stop
stopping
(
Md.26
All
No
Servo
axes
change
OFF
Servo
amplifier
disconnected
Each
No
During
axis
change
error
Servo
OFF
Each
No
During
axis
change
error
No
change
All
During
Turns
axes
error
OFF
No
change
Each
No
During
axis
change
error
OPR control
Major
Machine
Fast
positioning
OPR
OPR
control
control
control
)
Servo OFF or free run
(The operation stops with dynamic brake or
electromagnetic brake.)
Deceleration stop/sudden stop
(Select with "
Pr.37
sudden stop selection" )
Deceleration stop/sudden stop
(Select with "
Pr.38
sudden stop selection" )
Deceleration stop/sudden stop
(Select with " Pr.39 Sudden stop group3
sudden stop selection" )
1 - 26
MELSEC-Q
Stop process
Manual control
High-level
JOG/
positioning
Inching
control
operation
Sudden stop group1
Sudden stop group2
Manual
pulse
generator
operation
Deceleration
stop
Deceleration
stop
Deceleration
stop
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