Mitsubishi Electric MELSEC QS SERIES User Manual page 123

9
TROUBLESHOOTING
Error Error
classification item
0304 Input dark test error
450
0305 Output dark test error
External power supply
0402
voltage error
Name
The test pulse could not be detected during
the input dark test.
<Detailed item 6>
Upper 8 bits
When [Detailed item 8] is 1(MPU A)
bD bC bB bA b9 b8
bF bE
When [Detailed item 8] is 2(MPU B)
bF bE bD bC bB bA b9 b8
The test pulse could not be detected during
the output dark test.
<Detailed item 6>
Upper 8 bits
When [Detailed item 8] is 1(MPU A)
bF to bC
bB bA b9 b8
When [Detailed item 8] is 2(MPU B)
bF to bC bB bA b9 b8
Voltage error or hardware failure of external
power supply.
Error definition
b7 to b0
bit0 to bit7:
00 : test pulse not output
H
01 : test pulse output
H
bit8:X0 0:Normal 1:Error
bit9:X2 0:Normal 1:Error
bitA:X4 0:Normal 1:Error
bitB:X6 0:Normal 1:Error
bitC:X8 0:Normal 1:Error
bitD:XA 0:Normal 1:Error
bitE:XC 0:Normal 1:Error
bitF:XE 0:Normal 1:Error
b7 to b0
bit0 to bit7:
00 : test pulse not output
H
01 : test pulse output
H
bit8:X1 0:Normal 1:Error
bit9:X3 0:Normal 1:Error
bitA:X5 0:Normal 1:Error
bitB:X7 0:Normal 1:Error
bitC:X9 0:Normal 1:Error
bitD:XB 0:Normal 1:Error
bitE:XD 0:Normal 1:Error
bitF:XF 0:Normal 1:Error
b7 to b0
bit0 to bit7:
00 : test pulse not output
H
01 : test pulse output
H
bit8:Y0- 0:Normal 1:Error
bit9:Y1+ 0:Normal 1:Error
bitA:Y2- 0:Normal 1:Error
bitB:Y3+ 0:Normal 1:Error
Fixed to 0
b7 to b0
bit0 to bit7:
00 : test pulse not output
H
01 : test pulse output
H
bit8:Y0+ 0:Normal 1:Error
bit9:Y1- 0:Normal 1:Error
bitA:Y2+ 0:Normal 1:Error
bitB:Y3- 0:Normal 1:Error
Fixed to 0
9.5 Error Code List
9
Corrective action
(1) Reexamine the
connected devices
and the wiring.
(2) Replace the safety
remote I/O module.
(1) Check the
connected
devices, wiring,
and voltage.
(2) Adjust the timing of
the external power
supply ON to the
timing of module
power supply ON.
(3) Replace the safety
remote I/O module.
9
- 25