Mitsubishi MELSEC-Q QD77MS, User Manual

Page: 598 / 976

11 - 5
Chapter 11 Manual Control
Important
Use the hardware stroke limit function when carrying out JOG operation near the
upper or lower limits. (Refer to Section "13.4.4").
If the hardware stroke limit function is not used, the workpiece may exceed the
moving range, causing an accident.
Precautions during operation
The following details must be understood before carrying out JOG operation.
(1) For safety, first set " Cd.17 JOG speed" to a smaller value and check the
movement. Then gradually increase the value.
(2) An axis error will occur and the operation will not start (error code: 300) if the
"JOG speed" is outside the setting range at the JOG start.
(3) An axis error will occur and the operation will not start (error code: 956) if
" Pr.31 JOG speed limit value" is set to a value larger than " Pr.8 speed limit
value".
(4) If " Cd.17 JOG speed" exceeds the speed set in " Pr.31 JOG speed limit
value", the workpiece will move at the " Pr.31 JOG speed limit value" and an
"Axis warning" will occur in the QD77MS (warning code: 301).
(5) The JOG operation can be continued even if an "Axis warning" has occurred.
(6) Set a "0" in "
Cd.16 Inching movement amount". If a value other than "0" is
set, the operation will become an inching operation (Refer to Section 11.3
"Inching operation").
Operations when stroke limit error occurs
When the operation is stopped by hardware stroke limit error or software stroke
limit error, the JOG operation can execute in an opposite way (direction within
normal limits) after an error reset. (An error will occur again if JOG start signal is
turned ON in a direction to outside the stroke limit.)
JOG operation possible
JOG operation not possible
Upper/lower
limit signal
JOG operation
V
ON
OFF