Mitsubishi Electric MELSEC-L LD75P User Manual page 551

(c) Add the following program to the control program, and write it to the CPU module.
Example
External command
valid signal
Write 1000000 to D108 and D109.
DTOP H0
TOP H0
TOP H0
Input the external command signal.
CHAPTER 12 CONTROL SUB FUNCTIONS
[Speed change processing]
K1514 D108 K1
Write the new speed.
Set the external command function
K62
K1 K1
selection to external speed change
request.
Set the external command signal input
K1505 K1 K1
to valid.
(LD75 starts speed change processing.)
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