Supplementary Explanation Of Devices For Error Detection; Error Detection (M8060 To/D8060 To) - Mitsubishi Electric FX3G SERIES Programming Manual

Programmable controllers

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Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

Supplementary Explanation of Devices for Error Detection

When the M8060, M8061, M8064 to M8067 turn ON, the smallest ON device number is stored in D8004, and M8004

M8060,M8061,M8064 to M8067 are cleared when the PLC mode switches from STOP to RUN.

Note that M8068 and D8068 do not clear.

When turning M8069 ON in advance, PLC will enter STOP mode (as M8061 PLC hardware error occurs) if a

failure occurs in an I/O extension unit, an extension power supply module, or an extension unit/block.

When turning M8069 ON, PLC executes I/O bus check. If an error is found, error code 6103 or 6104 is stored to

D8061, and M8061 turns ON.

When error code 6104 is stored, M8009 turns ON, and the PLC stores the I/O numbers following the extension

power supply module or the powered extension unit with DC 24V output failure to D8009.

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.

Example: When X020 is unconnected

10 to 337 in FX

When a device number is specified directly or indirectly with an index by the LD, AND, OR or OUT instruction, and

if the device numbers specified in those instructions are not actually loaded, M8316 will turn ON and the error step

number in the instruction will be written to D8317 (high-order bits) and D8316 (low-order bits).

BCD conversion value

Device number

1: Input (X), 0: Output (Y)

PLCs, and 10 to 177 in FX

38 Error Check Method and Error Code List

38.3 Supplementary Explanation of Devices for Error Detection

Fx3u series Fx3uc series