Mitsubishi QJ71MB91 - 6.7 Maintenance, Inspection

6
PRE-OPERATIONAL PROCEDURES AND SETTINGS
6.7 Maintenance, Inspection
6.7.1 Maintenance, inspection
6 - 24
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
MODBUS(R) STANDARD FUNCTIONS
5
FUNCTION
6
PRE-OPERATIONAL PROCEDURES AND SETTINGS
7
PARAMETER SETTING
8
UTILITY PACKAGE (GX Configurator-MB)
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)
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.
POINT
For the QJ71MB91 maintenance and inspection, read the safety precautions
provided in the first pages of this manual.
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 >
<Programmable controller CPU 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
procedures and settings".
(Procedure 1) Use the GX Developer to read the PLC parameters from the programmable
controller CPU and save them.
(Procedure 2) Replace the programmable controller CPU.
( QCPU User's Manual (Hardware Design, Maintenance and
Inspection))
(Procedure 3) Register the PLC parameters saved with the GX Developer to the
programmable controller CPU.