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

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
38.3

Supplementary Explanation of Devices for Error Detection

38.3.1

Error detection (M8060 to/D8060 to)

When the M8060, M8061, M8064 to M8067 turn ON, the smallest ON device number is stored in D8004, and M8004
turns ON.
1) M8060,M8061,M8064 to M8067 are cleared when the PLC mode switches from STOP to RUN.
Note that M8068 and D8068 do not clear.
2) 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.
3) 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
1 0 2 0
*1. 10 to 337 in FX
4) 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).
882
BCD conversion value
*1
Device number
1: Input (X), 0: Output (Y)
/FX PLCs, and 10 to 177 in FX
3U 3UC
38 Error Check Method and Error Code List
38.3 Supplementary Explanation of Devices for Error Detection
PLCs
3G