Mitsubishi MELSEC-WS0-CPU0 User Manual page 88

Chapter 10
LED indication on module
CPU module Safety I/O module
(WS0-CPU0, WS0- (WS0-XTIO or
CPU1 or WS0-CPU3) WS0-XTDI)
MS =  Red or MS =  Red
Red (2 Hz) (with
or
firmware ≥ V2.01.0)
(with firmware ≥
or
V2.00.0)
MS =  Red or
(firmware V1.xx.0)
MS =  Red
(firmware V1.xx.0)
85
Diagnostics
Possible error
codes
CPU module:
0x0006C002,
Red (2 Hz)
0x0007C002,
0x0001C005,
0x0003C006,
0x0005C006,
0x0029C006,
0x0003C013
CPU module:
0x0001C013,
0x0004C013,
0x0005C013,
0x000CC013
CPU module:
0x002AC006
WS0-XTIO/
WS0-XTDI:
0xC306
CPU module:
0x0029C006
WS0-XTIO/
WS0-XTDI:
0xC307
CPU module:
0x0029C006
WS0-XTIO:
0xC30A
CPU module:
0x0029C006
Possible reasons
 Follow on error for other critical
errors.
 Disturbance of CPU module internal
signals due to heavy EMC
disturbance.
 Hardware failure in CPU module or
any safety I/O module.
 FLEXBUS+ communication
(backplane communication to I/O
modules and to network modules)
disturbed due to EMC disturbance.
 FLEXBUS+ communication
(backplane communication to I/O
modules and to network modules)
disturbed due to critical fault in I/O
modules. In this case this is a follow
on error and there will be also other
critical faults with almost the same
time stamp (± 1 s) in the diagnosis
history.
Unequal input data from safety I/O
*2
module:
 A dual channel input at WS0-XTIO
module or WS0-XTDI module has 2
signal dips (High to Low) with a time
distance of 2 ms (e.g. test gaps of
an OSSD output or bouncing relay
contacts).
 A signal channel input at WS0-
XTIO module or WS0-XTDI module
changes state in intervals of 4 ms
for a duration of 40 ms or more (e.g.
proximity switch to a tooth wheel).
Internal hardware failure of WS0-

XTIO or WS0-XTDI module.
 Follow on error of CPU module:
0x0029C006
 Power supply at terminal A2 (GND)
of WS0-XTIO module interrupted.
 Internal hardware failure of WS0-
XTIO or WS0-XTDI module.
 Follow on error of CPU module:
0x0029C006
 Short circuit to 24V or cross-circuit
in wiring of safe output Q1...Q4
(whose LED is flashing).
 Capacitive load exceeded the
allowed maximum value (e.g. by
capacitor for spark quenching).
 Inductive load exceeded the
maximum value allowed
 Internal hardware failure of WS0-
XTIO module.
 Follow on error of CPU module:
0x0029C006
Possible measures
 Check the other diagnosis
messages for critical faults with
almost the same time stamp.
 To reset the error power cycle the
CPU module.
 If error persists, then replace
subsequently CPU module and
safety I/O modules.
 To reset the error power cycle the
CPU module.
 Check installation for EMC aspects
(FE connection of DIN mounting
rail and control cabinet, star wiring
of 24 V power supply, local
separation of power parts and
control parts,...)
 Check the other diagnosis
messages with almost same time
stamp.
 To reset the error power cycle the
CPU module.
 Change the configuration by
activating the ON-OFF filter and
activating the OFF-ON filter for
inputs of the effected WS0-
XTIO/WS0-XTDI module. Please
be aware that this increases the
response time for this signal by at
least 8 ms.
To reset the error power cycle the

CPU module.
 Replace WS0-XTDI/WS0-XTIO
module in hardware installation.
 Check supply voltage at terminals
A1 (24 V) and A2 (0 V) at the WS0-
XTIO module, also under worst
case load conditions.
 To reset the error power cycle the
CPU module.
 If the error persists, replace WS0-
XTDI/WS0-XTIO module in
hardware installation.
 Check wiring of effected output.
 Check capacitive load.
 Check inductive load.
 To reset the error power cycle the
CPU module.
 If the error persists, replace WS0-
XTIO module in hardware
installation.