Maintenance, Inspection; When Removing Or Installing The Module - Mitsubishi QJ71MB91 User Manual

6
PRE-OPERATIONAL PROCEDURES AND SETTINGS

6.7 Maintenance, Inspection

This section explains maintenance, inspection and removal/installation methods for
QJ71MB91.
6.7.1 Maintenance, inspection
For the QJ71MB91, except for the following check items, there are no specific inspection
items.
For other than shown below, in order to have the system run normally in optimal
conditions, perform maintenance as described in the QCPU User's Manual (Hardware
Design, Maintenance and Inspection).
(QJ71MB91 inspection items)
POINT

6.7.2 When removing or installing the module

When removing/installing the module, read "6.1 Handling Precautions" and pay full
attention to safety to handle the product correctly.
The module replacement procedure is shown below.
< QJ71MB91 replacement operation procedure >
(Procedure 1) Power OFF the station.
(Procedure 2) Disconnect the cable and remove the module.
(Procedure 3) Replace the module and start it according to "6.2 Pre-operational
<Programmable controller CPU replacement operation procedure >
(Procedure 1) Use the GX Developer to read the PLC parameters from the programmable
(Procedure 2) Replace the programmable controller CPU.
(Procedure 3) Register the PLC parameters saved with the GX Developer to the
1) Check that any poor connection is observed at the terminating resistors or
connection cables.
2) Check that the module fixing screws and the terminal block mounting screws
are tightened securely.
For the QJ71MB91 maintenance and inspection, read the
provided in the first pages of this manual.
procedures and settings".
controller CPU and save them.
( QCPU User's
Inspection))
programmable controller CPU.
Manual (Hardware Design,
6.7 Maintenance, Inspection
6.7.1 Maintenance, inspection
safety precautions
Maintenance and
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