Speed Change (Chgv Instruction) - Mitsubishi Electric Q Series Programming Manual

7 AUXILIARY AND APPLIED FUNCTIONS

7.4 Speed Change (CHGV instruction)

[Control details]
The speed change is executed at the positioning control or JOG operation.
S(P).CHGV instruction of PLC program or CHGV instruction of Motion program is
used for the speed change.
(1) A speed of operating axis is forcibly changed to the speed specified with the
speed change registers.
(2) Refer to Section 3.5 for details of the S(P).CHGV instruction of PLC program.
Refer to Section 6.16.17 for details of the CHGV instruction of Motion program.
(3) A speed change should be set within the range of "-speed limit value to + speed
limit value". If it is outside the range, a minor error "305" will occur.
(4) When a speed change is executed during positioning control of program
operation, make the override invalid. When the override is valid, a speed change
is not executed.
(5) During a temporary stop, a speed change is not executed.
(6) A speed change during constant-speed control (when the axis travels through mid
points continuously during execution of G01, G02, G03, G12, G13 or G32) should
be set within the range of "-F command to +F command". If it is outside the range,
the speed is controlled by F command.
(7) The F command after a speed change during constant-speed control is made
valid within the range of the change speed or less.
(8) If a speed change is executed during positioning control for program operation, it
operates at the speed changed to the command of the next travel block.
It changes whether the speed change value is continued or the speed changes
command speed value in the program depending on the next type of travel block
mode as the table "command speed after execution of speed change" of next
page.
(9) A speed change for the high-speed oscillation axis is invalid.
7 - 49