Mitsubishi Electric MELSEC-LD77MS2 User Manual page 721

[4] Precautions during software stroke limit check
(1) A machine OPR must be executed beforehand for the "software stroke limit
function" to function properly.
(2) During interpolation control, a stroke limit check is carried out for the every
current value of both the reference axis and the interpolation axis. Every
axis will not start if an error occurs, even if it only occurs in one axis.
(3) During circular interpolation control, the "
"/"
value
Pr.13
In this case, a deceleration stop will not be carried out even if the stroke limit
is exceeded. Always install an external limit switch if there is a possibility the
stroke limit will be exceeded.
Example
Axis 1
Axis 1 stroke limit
: The software stroke limit check is carried out for the following addresses during circular
interpolation control. (Note that " Da. 7 Arc address" is carried out only for circular interpolation
control with sub point designation.)
Current value/end point address ( Da. 6 )/arc address ( Da. 7 )
(4) If an error is detected during continuous path control, the axis stops
immediately on completion of execution of the positioning data located right
before the positioning data in error.
Example
• If the positioning address of positioning data No. 13 is outside the software stroke limit range,
the operation immediately stops after positioning data No. 12 has been executed.
No.10
Md. 26
Axis operation status
Software stroke limit lower limit value
Arc address ( Da. 7 )
Starting address
No.11 No.12
Position control
13 - 31
Chapter 13 Control Sub Functions
Software stroke limit upper limit
Pr.12
" may be exceeded.
Deceleration stop not carried out
End point address ( Da. 6 )
Axis 2
Immediate stop at
error detection
No.13
Error
Positioning data
No.10
P11
No.11
P11
No.12
P11
No.13
P11
No.14
P01