Mitsubishi Electric MELSEC QS SERIES User Manual page 121

9
TROUBLESHOOTING
Error Error
classification item
Double input discrepancy
0102
detection error
450
Output overload error
0203 (Diagnostics before Safety
LED turns on)
Name
A discrepancy between two input signals
(such as X0 and X1, X2 and X3) continues
longer than the preset double input
discrepancy detection time.
<Detailed item 2>
bit0: 1:X0 ON 0:X0 OFF
bit1: 1:X1 ON 0:X1 OFF
bitE: 1:XE ON 0:XE OFF
bitF: 1:XF ON 0:XF OFF
<Detailed item 3>
Module technical version C or earlier: fixed
to 0
Module technical version D or later:
the double input discrepancy status
X0, X1 mismatch: bit0 is 1
XE, XF mismatch: bit7 is 1
The overcurrent protection or overheat
protection has been activated in the output
circuit transistor.
Error definition
X0, X1 match: bit0 is 0
XE, XF match: bit7 is 0
9.5 Error Code List
Corrective action
Reexamine the
connected devices
and the wiring.
Check whether the
double input
discrepancy detection
time is properly set.
(1) Reexamine
the connected
devices and
the wiring.
(2) Replace the
safety remote
I/O module.
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