Mitsubishi Q Series User Manual

8 - 7 8 - 7
MELSEC-Q
8 TROUBLESHOOTING
8.8 If the Module READY Flag (Xn3) Does Not Turn ON
Check item Corrective action
Has an error occurred on the programmable
controller?
• Q62HLC hardware fault.
Please consult your sales representative.
8.9 If the FeRAM Write Failure Flag (XnA) Has Turned ON
Check item Corrective action
• Execute writing into FeRAM again.
If the FeRAM write failure flag (XnA) does
not turn off, it represents Q62HLC hardware
fault.
Please consult your sales representative.
8.10 If Auto Tuning Does Not Start (If the Auto Tuning Status Flag (Xn4, Xn5) Does Not
Turn ON)
Check item Corrective action
Are start conditions for auto tuning met? • Check whether the all conditions are met
with referring to Section 3.2.1 (2) (a).
Has auto tuning been completed abnormally? • Check whether the auto tuning has
completed abnormally with referring to
Section 3.2.1 (2) (d).
8.11 If Auto Tuning Does Not Complete (If the Auto Tuning Status Flag (Xn4, Xn5) Remains
to Be ON and Does Not Turn OFF)
Check item Corrective action
Is the FeRAM's PID constant read/write flag
(buffer memory address: 31) set to 1 (ON)?
• Set 0 (OFF) to the Automatic backup setting
after auto tuning of PID constants (buffer
memory address: 63, 95), and turn OFF the
FeRAM's PID constant read/write flag (buffer
memory address: 31).
Is the FeRAM's PID constant read command
(buffer memory address: 62, 94) set to 1 (With
command)?
• Set the FeRAM's PID constant read
command (buffer memory address: 62, 94)
to 0 (Without command).
Is the set value (SV) set correctly? (Does the
manipulated value (MV) remain 0% since the
set value (SV) is small?)
• Set arbitrary control value to the set value
(SV).

Mitsubishi Q Series Specifications

General

Brand	Mitsubishi
Model	Q Series
Category	Control Unit
Language	English