Mitsubishi Electric MELSEC Q Series User Manual page 150

7 ONLINE MODULE CHANGE
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(2) Dismounting of module
(a) After choosing [Diagnosis] - [Online module change] on GX Developer to
enter the "Online module change" mode, double-click the module to be
changed online to display the "Online module change" screen.
(b) Click the "Execution" button to enable a module change.
If the following error screen appears, click the "OK" button and perform the
operation in (2)(c) and later in this section.
(c) After confirming that the "RUN" LED of the module has turned off,
disconnect the external wiring and dismount the module.
POINT
(1) If you have removed the wiring together with the terminal block, the temperature
process values may vary within the accuracy range due to the error of the
specific cold junction temperature compensation resistor. (the Q64TCTT,
Q64TCTTBW only)
(2) Always dismount the module. If mounting confirmation is made without the
module being dismounted, the module will not start properly and the "RUN" LED
will not be lit.
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MELSEC-Q
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