Mitsubishi FX1S Series Programming Manual page 358

FX Series Programmable Controller Diagnostic Devices 6
Note 6:
•If the unit or block corresponding to a programmed I / O
number is not actually loaded, M8060 is set to ON and the
first device number of the erroneous block is written to
D8060.
Note 7:
•An I/O bus check is executed when M8069 is turned ON.
If an I/O bus error occurs, error code 6103 is written to
D8069 and M8061 is turned ON.
If an Extension unit 24V failure occurs, error code 6104 is written to D8061 and M8061 is
turned ON. M8009 will then be turned ON and the I/O address of the lowest numbered device
affected by the 24V DC power failure is written to D8009
General note:
•HPP refers to Handy programming panel.
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