Troubleshooting; Error Code List - Mitsubishi Electric MELSEC Q Series User Manual

8 TROUBLESHOOTING

8 TROUBLESHOOTING

8.1 Error Code List

Error
code
• A value other than 0
was written to the
2
reserved area.
• Write to the area write-
enabled in the setting
mode only*1 was
performed in the
operation mode*2.
3
• Data outside the
setting range was
written.
4
8
• The setting of the
upper/lower output
limiter or upper/lower
setting limiter is illegal.
5
• The set value was
changed during default
6 setting registration.
*1: The following areas are write-enabled in the setting mode only:
• Input range (buffer memory address: 20
• Alert 1 to 4 mode setting (buffer memory address: C0
*2: The system is in the operation mode when:
• Yn1 or Xn1 is on; or
• Yn1 has turned from on to off and the PID continuation flag (buffer memory address: A9
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The error code of the Q64TC is stored into address 0 of the buffer memory.
The error code is stored into the lower 3 bits of address 0 and the error-detected buffer
memory address into the upper 12 bits.
b15
0
Table 8.1 Error Code List
Cause
• The written data is held as is.
• If the data was written to more than one write area, the
buffer address where the error was detected first is
retained.
• The written data is held as is.
• If the data was written to more than one write area, the
lower address of the buffer memory where the error
occurred is stored prior to higher addresses.
• The written data is held as is.
• If the temperature, time or % setting is beyond the upper
or lower limit value, the upper/lower limit value is used to
exercise control.
• If the data outside the range was written to more than one
write area, the lower address of the buffer memory where
the error occurred is stored prior to higher addresses.
• The written data is held as is.
• The upper and lower limit values that may be set are used
to exercise control.
• The error occurrence address is stored into the write data
error code (buffer memory address: 0
• If the data was written to more than one write area, the
lower address of the buffer memory where the error
occurred is stored prior to higher addresses.
• The written data is ignored.
• Any set value cannot be changed until error reset is
made.
• If another write error occurs, the buffer memory address
data does not change.
, 40
H
search engine
to b4
Error-time operation
).
H
, 60 , 80 )
H H H
to C3 , D0 to D3 , E0
H H H H
MELSEC-Q
b2 to b0
Error code
Error occurrence address
Corrective action
• Turn on the error reset command (Yn2).
• Delete the program for performing write
to the reserved area.
• Make error rest in the following
procedure:
1) Choose the setting mode.
2) Set a correct value.
3) Turn on the error reset command
(Yn2).
• When changing from the operation
mode to the setting mode, make sure
that the PID continuation flag (buffer
memory address: A9
the operation mode command (Yn1).
• Set data within the range.
• Make setting so that the upper limit
value is greater than the lower limit
value.
• After turning on the error reset
command (Yn2), change the set value.
to E3 , F0 to F3 )
H H H H
) is 1.
H
) is 0 and turn off
H
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