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8 TROUBLESHOOTING
8 TROUBLESHOOTING
8.1 Error Code List
Error
Cause
code
• A value other than 0
2
was written to the
reserved area.
• Write to the area write-
enabled in the setting
mode only*1 was
performed in the
3
operation mode*2.
• Data outside the
setting range was
written.
4
8
• The setting of the
upper/lower output
limiter or upper/lower
5
setting limiter is illegal.
• The set value was
changed during default
6
setting registration.
8 - 1
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.
to
b15
0
Table 8.1 Error Code List
Error-time operation
• The written data is held as is.
• If the data was written to more than one write area, the
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
address where the error was detected first is retained.
• 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 address where the error was detected first
is retained.
• 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 buffer
memory address 0.
• If the data was written to more than one write area, the
address where the error was detected first is retained.
• 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.
b4
b2 to b0
• Make error reset (Yn2 : ON).
• Delete the program for performing write
• Make error rest in the following
• When changing from the operation
• Set data within the range.
• Make setting so that the upper limit
• After making error reset (Yn2: ON),
:
*1
The following areas are write-enabled in the setting mode only:
•
Input range (20
, 40
, 60
H
H
H
•
Alert 1 to 4 mode setting (C0
to F3
)
H
*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 (A9
MELSEC-Q
Error code
Error occurrence address
Corrective action
to the reserved area.
procedure:
1) Choose the setting mode.
2) Set a correct value.
3) Make error reset (Yn2: ON).
mode to the setting mode, make sure
that the PID continuation flag (A9
and turn off Yn1.
value is greater than the lower limit
value.
change the set value.
, 80
)
H
to C3
, D0
to D3
, E0
to E3
H
H
H
H
H
8 - 1
) is 0
H
, F0
H
H
) is 1.
H
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