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Mitsubishi Electric FR-CS84-012 Instruction Manual Page 123

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 Adjusting the stall prevention operation signal and output timing (OL
signal, Pr.157)
• If the output current exceeds the stall prevention operation level and stall prevention is activated, the Overload warning
(OL) signal turns ON for 100 ms or more. The output signal turns OFF when the output current falls to the stall prevention
operation level or less.
Pr.157 OL signal output timer
time period.
• This function also operates during regeneration avoidance operation ("
Pr.157 setting
0 (initial value)
Output immediately.
0.1 to 25
Output after the set time (s).
Not output.
Overload state
(OL operation)
OL output signal
• For the OL signal, set "3 (positive logic)" or "103 (negative logic)" in Pr.195 (Output terminal function selection) to assign
the function.
• If the stall prevention operation lowers the output frequency to 0.5 Hz and kept the level for 3 seconds, the stall prevention stop
(E.OLT) is activated to shut off the inverter output.
• Changing the terminal assignment using Pr.195 (Output terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
5.6 (H) Protective function parameter
can be used to set whether to output the OL signal immediately, or to output it after a certain
Pr.157 Set time(s)
" overvoltage stall).


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