Precautions For Online Module Change - Mitsubishi Electric MELSEC Q Series User Manual

7 ONLINE MODULE CHANGE

7.5 Precautions for Online Module Change

7 - 36
The followings are the precautions for Online module change.
(1) Always perform Online module change in the correct procedure. A failure to do
so can cause a malfunction or failure.
(2) If Online module change is set in the user range setting, the accuracy after that
will fall to about less than three times of the accuracy before that.
Re-set the offset/gain values as necessary.
(3) Do not perform Online module change in the offset/gain setting mode. (If
performed, the Q62DA-FG may not operate properly.)
(4) Do not perform the following operations (a) and (b) during Online module
change. (If performed, the Q62DA-FG may not operate properly.)
(a) Power off the programmable controller CPU.
(b) Reset the programmable controller CPU.
(5) If a module having the first five digits (product information) 11102 or later was
replaced with a module having 11042 or later, the following settings are ignored.
• Disconnection detection mode setting (buffer memory address 141: Un\G141),
• CH Disconnection detection setting value (buffer memory address 142,143:
Un\G142, Un\G143).
In this case, the disconnection detection function operates by default (detect the
disconnection at an output monitor value of 1mA).
MELSEC-Q
7 - 36