Speed Change Function - Mitsubishi Electric MELSEC-L02SCPU User Manual

7.10.3

Speed change function

The speed change function changes the operating speed to a newly specified speed at a desired timing. This function
is implemented with the Speed change instruction (IPSPCHG1(P)) by setting the new speed value, ACC/DEC time at
speed change and DEC/STOP time at speed change ( Page 156, Section 7.12.1 (8)).
(1) Controls that permit speed change and timings of change
The speed can be changed during the controls denoted by "Speed change possible" in the table below, at the
specified timings. If speed change is not possible, a "Speed change not possible" warning (Axis 1 warning code:
1022) occurs and the instruction is ignored, or the instruction is simply ignored without any warning.
Control
Machine OPR
OPR control
Fast OPR
Position control
Speed control
Positioning
Speed control of
control
speed/position switching
control
Position control of
speed/position switching
control
JOG operation
(2) Description of operation
Ex.
Speed change under speed control
V
Bias speed at
start
Speed change instruction
OFF
execution command
During
During
constant-speed
acceleration
operation
Warning Warning
Speed change
Warning
possible
Speed
Speed change
change
possible
possible
Speed
Speed change
change
possible
possible
Speed change
Warning
possible
Speed
Speed change
change
possible
possible
Command speed Decelerating (accelerating) by ACC/DEC time at speed change
ON
CHAPTER 7 POSITIONING FUNCTION
During speed change
by the Speed change During
instruction deceleration
(IPSPCHG1(P))

Warning
Warning Warning
Speed change possible
Speed change possible
Warning Warning
Speed change possible Ignored
During
deceleration by
the Axis stop
instruction
(IPSTOP1)
Ignored
Ignored

Ignored
 Ignored
Ignored
Ignored
New speed
value
New speed
value
New speed
value
Decelerates by DEC/STOP
time at speed change
t
115
7