Mitsubishi Electric Q Series, Programming Manual

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4 POSITIONING DEDICATED SIGNALS
4.1.6 Synchronous encoder axis command signals
(1) Error reset command (M5440+4n) .........................Command signal
(a) This command is used to clear the minor/major error code storage register
of synchronous encoder of an axis for which the error detection signal has
turn on (M4640+4n : ON), and reset the error detection signal (M4640+4n).
(b) The following processing is executed when the error reset command turns
on.
• If the synchronous encoder and output module are normal, the minor/major
error code storage registers are cleared and the error detection signal
(M4640+4n) is reset.
• If the synchronous encoder and output module error has not been
canceled, the error code is again stored in the minor/major error code
storage register.
In this case, the error detection signal (M4640+4n) remains on.
Reset the output module error by error reset of each axis command
signal to the output module.