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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.4.5 Forced stop function
!
DANGER
When the forced stop is required to be wired, ensure to wire it in the negative logic using b-contact.
Provided safety circuit outside the QD75MH so that the entire system will operate safety even when the
"
Pr.82
Forced stop valid/invalid" is set "1: Invalid". Be sure to use the forced stop signal (EMI) of the
servo amplifier.
By the QD75MH external equipment connector is connected forced stop, this function
is available for all axes of servo amplifier. (The initial value is "0: Valid".)
The forced stop input valid/invalid is selected by "
Pr.82
Forced stop valid/invalid".
The details shown below explain about the "forced stop function".
[1] Control details
[2] Wiring the forced stop
[3] Setting the forced stop
[4] How to check the forced stop
[5] Precautions during control
[1] Control details
A warning "controller forced stop warning (warning code: 2147)" will occur if
turned on the forced stop input signal when the "
Pr.82
Forced stop valid/invalid"
is set "0: Valid". And then it is available for all axes of servo amplifier.
The outline of the forced stop process is shown below.
Stop process
OPR control Manual control
Stop cause
Stop
axis
M code
ON
signal
after stop
Axis
operation
status
(
Md.26
)
after
stopping
Machine
OPR
control
Fast OPR
control
Major
positioning
control
High-level
positioning
control
JOG/
Inching
operation
Manual
pulse
generator
operation
Forced stop
"Forced stop input
signal" OFF
All axes
No
change
Servo OFF
Servo OFF or free run (The operation stops with dynamic
brake)