Mitsubishi Electric MELSEC-L LD75P User Manual page 585

(3) Control precautions
• During interpolation control, the reference axis M code ON signal is turned ON.
• The M code ON signal will not turn ON if "0" is set in "[Da.10] M code". (The M code will not be output, and
the previously output value will be held in "[Md.25] Valid M code".)
• If the M code ON signal is ON at the positioning start, an error "M code ON signal start (error code: 536)" will
occur, and the positioning will not start.
• If the PLC READY signal [Y0] is turned OFF, the M code ON signal will turn OFF and "0" will be stored in
"[Md.25] Valid M code".
• If the positioning operation time is short during continuous path control, there will not be enough time to turn
OFF the M code ON signal, and a warning "M code ON signal ON (warning code: 503)" may occur. In this
case, to avoid the warning, set "0" in the "[Da.10] M code" of that section's positioning data so that the M
code is not to be output.
• In the AFTER mode during speed control, the M code is not output and the M code ON signal does not turn
ON.
• If current value changing where "9003" has been set to "[Cd.3] Positioning start No." is performed, the M
code output function is made invalid.
CHAPTER 12 CONTROL SUB FUNCTIONS
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