Mitsubishi Electric MELSEC Q Series Programming Manual page 222

6 TROUBLESHOOTING
Error Detail
code code Error contents
(SD32) (SD33)
Sequence
29 Error code programs for safety
observation error
0001H to
0007H
Safety signal
(Note-5)
30 module mounting
error
8000H
Safety observation

32 PLC CPU type
error
Sequence program

33
memory error
10H+n
(HEX)
20H+n
(HEX)
30 PLC parameter
34
(HEX) unauthorized
31
(HEX)
40
(HEX)
PLC parameter

35
read error
Safety observation
device memory

46
check error
(PLC CPU)
Table 6.1 Safety observation error list (Continued)
Error cause
The sequence programs for safety
observation stored in the Motion CPU is
incorrect.
Failed to confirm the mounting statuses of
the number of safety signal units that is set
in the parameter "Safety signal module
number".
An error is detected in the diagnosis of
communication with the safety signal
module.
The PLC CPU type of the 1st module
doesn't support the safety observation
function.
The program memory in which a user
safety sequence program is stored in the
Motion CPU is corrupted.
The first device number setting of the
safety signal module for the PLC CPU
does not match with that for the Motion
CPU.
(n = Safety signal module station number 1
to 3)
In the PLC parameter of the PLC CPU, the
output mode at error for the safety signal
module is incorrect.
(n = Safety signal module station number 1
to 3)
In the PLC parameter of the PLC CPU, the
device point setting is incorrect.
In the PLC parameter of the PLC CPU, the
device point setting is less than the
necessary device range.
The following reasons may be responsible:
• The points of D (except for expansion D)
is less than 8k.
• The points of M is less than 8k.
• The points of T is less than 2k.
In the PLC parameter of the PLC CPU, the
time limit setting of the high-speed timer is
incorrect.
The PLC parameters of the PLC CPU
cannot be read.
The following causes are assumed.
• The PLC parameter of the PLC CPU is
deleted during operation.
An error is detected in a device memory
check of the PLC CPU.
Corrective action
Explain the error symptom and get advice
from our sales representative.
Check if the number of mounted safety signal
units is the same as the parameter setting.
Check the disconnection of the remote I/O
cable.
Check duplicate settings of rotary switches on
safety signal units.
Check the connection of the remote I/O cable.
If the error cannot be resolved, explain the
error symptom and get advice from our sales
representative.
Check the PLC CPU type.
If the error cannot be resolved, explain the
error symptom and get advice from our sales
representative.
Write the user safety sequence program in
the Motion CPU again.
Make the same first device number setting of
the safety signal module.
Set the output mode at error for the safety
signal module to "Clear".
Delete the sequence programs for safety
observation
(SSU_CMP/SLS_CMP/SNT_CMP), and turn
off the controller and then on again.
Check the device point setting.
Do not change the time limit setting of the
high-speed timer from 10.00.
Write the PLC parameter of the PLC CPU.
Check if the device which is used in the
sequence programs for safety observation is
not used in other programs.
When the error cannot be cleared by the
above solution, the PLC CPU may have a
failure.
Explain the error symptom and get advice
from our sales representative.
6 - 3
Relevant CPU
PLC Motion Reset
CPU CPU
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