If The Auto Tuning Is Not Completed (If The Auto Tuning Status (Xn4 To Xn7) Remains On And Does Not Turn Off); If The Alert Occurrence Flag (Xnc To Xnf) Has Turned On - Mitsubishi Electric MELSEC Q Series User Manual

8 TROUBLESHOOTING
8.10 If the Auto Tuning Is Not Completed (If the Auto Tuning Status (Xn4 to Xn7) Remains
On and Does Not Turn Off)

8.11 If the Alert Occurrence Flag (XnC to XnF) Has Turned On

8 - 5
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Check item
2
Is the E PROM's PID constant read/write
completion flag (buffer memory address: 1F
set to 1 (on)?
2
Is the E PROM's PID constant read command
(buffer memory address: 3E
set to 1 (With command)?
Is the set value (SV) set correctly? (Does the
manipulated value (MV) remain 0 % since the
set value (SV) is small?)
Check item
Is the measured temperature error/alert set
value beyond the range?
Is a disconnection detected?
search engine
• Set 0 (off) to the Automatic backup setting
after auto tuning of PID constants (buffer
memory address: 3F
)
H
turn off the E
read/write completion flag (buffer memory
address: 1F
• Set the E
, 5E , 7E , 9E ) command (buffer memory address: 3E
H H H H
5E , 7E
H
• Set arbitrary control value to the set value
(SV).
• Check the alert definition (buffer memory
address: 5
alert that occurred.
MELSEC-Q
Corrective action
, 5F , 7F , 9F
H H H H
2
PROM's PID constant
).
H
2
PROM's PID constant read
, 9E ) to 0 (Without command).
H H
Corrective action
to 8 ) and take action for the
H H
8 - 5
), and
,
H